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2000 silverado ac wiring diagram - 1997 Chevy Silverado 2wd ac compressor wiring diag

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2002 Chevrolet Silverado 2500 fuse box diagram. The 2002 Chevrolet Silverado 2500 has 3 different fuse boxes: ... Accessory Power/Trailer Wiring Feed. Fuse MAXI . ABS. Anti-Lock Brakes. Fuse MAXI . IGN A. Ignition Switch. Fuse MAXI . AIR. ... Air Conditioning. Fuse MINI . AUX PWR. Cigarette Lighter Auxiliary Power Outlets. Fuse MINI .Save some money (check numbers with your year & model first) on a Dorman actuator on Amazon here → http://amzn.to/2aYWL9AGet the sawzall pocketknife tool on...Chevrolet Silverado 1500 2003 – ALL WIRING DIAGRAMS. Home CHEVROLET Chevrolet 2003 Chevrolet Silverado 1500 2003. AIR CONDITIONING – Chevrolet Silverado 1500 2003 – SYSTEM WIRING DIAGRAMS ANTI-LOCK BRAKES – Chevrolet Silverado 1500 2003 – SYSTEM WIRING DIAGRAMS ANTI-THEFT – Chevrolet Silverado 1500 2003 – …For the 2000 Chevrolet Silverado 1500, the symbols and labels associated with the wiring diagrams are fairly simple. Symbols such as 14AWG denote the wire size on the diagram (in this case, 14-gauge wire), while words like "ign" and "DFC" represent the vehicle's ignition and differential control relays. Knowing these symbols is ...Chevrolet Silverado I is a full-size pickup truck that was first introduced in the late 90s. They featured a classy look and was made for light-duty purposes. These light-duty trucks were available in three cab lengths. For the first year, the company released only the regular cab and a 3-door extended cab model.The VCM controls the ground path for the cooling fan relay. VCM will turn the auxiliary cooling fan ON when any of the following conditions exist: ECT above 107°C (225°F) . A/C head pressure above 300 psi. Once the auxiliary cooling fan has been turned ON by the Engine Coolant Temperature (ECT) sensor, the VCM will turn the fan OFF when that ...The wiring diagram for the 2000 Silverado PCM is vital to understanding the electronics and systems in your truck. It provides the blueprint for identifying and diagnosing issues, as well as helping you decide on repairs or modifications. Without a wiring diagram, it can be difficult to locate and diagnose problems, as well as complete repairs ...2001 CHEVROLET SILVERADO WIRING DIAGRAM - Chevrolet 2001 Silverado question. Search Fixya. Browse Categories ... I need the wiring diagram for mass air flow sensor on a 2001 chey silverado 1500 4.8. Posted on Apr 10, ... images for 2000 Chevrolet Silverado Wiring Diagram Google. Posted on Sep 03, 2009.Get manual with diagrams here:https://imgvehicle.com/1999 Chevrolet Silverado 1500 Partsopen 1999 Chevrolet Silverado 1500 Overview Cars com …2000 Chevy Silverado 1500 air conditioner problems. Freon is ok but no compressor engagement. This video will deal with breakdown of electrical circuits.The ac diagram shows a light green wire from the ac switch going to the low pressure cutout. The wire has 12v on it when the switch from the dash is engaged. ... For anyone having similar issues I recommend looking at your wiring from the switch on the back of the compressor. ... 2000 K2500 8.1 Swap. Latest: Road Trip; 47 minutes ago;Jun 27, 2022 · The wiring diagram for the 2000 Chevrolet Silverado 1500 is simple to read and follow. It includes symbols that represent the different components of the electrical system. These include resistors, capacitors, relays, switches, lamps, solenoids, and more. The diagram also includes color-coded lines to identify the circuit and its components. Get Access all wiring diagrams car. Manual A/C Wiring Diagram, Up Level. AIR CONDITIONING Compressor Wiring Diagram Heater Wiring Diagram Manual A/C Wiring Diagram, Base Manual A/C Wiring Diagram, Up Level AIR CONDITIONING – Chevrolet Silverado 1500 2000 – SYSTEM WIRING DIAGRAMS.Explore interactive fuse box and relay diagrams for the Chevrolet Silverado 1500. Fuse boxes change across years, pick the year of your vehicle: Fuse box diagrams 2019 Silverado 1500. ... Fuse box diagrams 2000 Silverado 1500. Fuse box diagrams 1999 Silverado 1500. Fuse box diagrams 1998 Silverado 1500. Is your car missing? Ask for your diagram ...This feature applies to many GM vehicles that use 4.3-liter V6, and 5.0-liter, 5.7-liter and other V8 motors, and it is taken directly from our digital online manual 24065 for the 1988-98 Chevrolet and GMC C/K 1500/2500/3500 pickup trucks (including 1999-2000 C/K Classics), Chevy Tahoe, Blazer, and Suburban, and GMC Yukon, Yukon Denali, and Suburban, …Overall, the 2000 Silverado AC Wiring Diagram is an invaluable resource for anyone looking to keep their vehicle's air conditioning system running smoothly. It provides an easy-to-understand guide on how to wire the system, saving time and money. Furthermore, it helps ensure that any needed repairs or replacements are done correctly, making ...For anyone with a 2000 Silverado truck, it's important to know the ins and outs of the wiring diagrams for their vehicle. The Silverado AC wiring diagram is the key to understanding and successfully repairing your Silverado's air conditioning system. Without it, you may be left scratching your head in confusion when trying to diagnose an issue.Fuel Injector Circuit Wiring Diagram (1999-2002 V8 Chevrolet Silverado, GMC Sierra) August 28, 2020 Updated: December 16, 2022 By: Abraham Torres-Arredondo Article ID: 1163 NOTE: The above fuel injector circuit wiring diagram applies to the following vehicles:Overall, the 2000 Silverado AC Wiring Diagram is an invaluable resource for anyone looking to keep their vehicle’s air conditioning system running smoothly. It provides an easy-to-understand guide on how to wire the system, saving time and money. Furthermore, it helps ensure that any needed repairs or replacements are done ...When you buy a new thermostat wiring bundle, it will come with a slashed number. You will typically find 18/5, 18/6, or 18/8 on the label. The first number (18 in this case) is the wire gauge. Thermostat wire should be 18 gauge to meet the electrical code. The number after the slash is how many wires are in the bundle.See more on our website: https://fuse-box.info/chevrolet/chevrolet-silverado-mk1-1999-2007-fuses-and-relayFuse box diagram (location and assignment of electr...The 2000 Silverado AC Wiring Diagram is a valuable asset for anyone looking to repair or replace their vehicle's air conditioning system. This diagram …For anyone with a 2000 Silverado truck, it’s important to know the ins and outs of the wiring diagrams for their vehicle. The Silverado AC wiring diagram is the …Find parts at https://apdty.com/00:00 - Intro01:00 - Remove Splash Shields01:32 - Loosen Serpentine Belt02:38 - Remove Fender Well03:57 - Remove Manifold Lin...The 2000 Chevrolet Silverado 1500 wiring diagram also includes wire colors. Knowing the wire color of a component can help technicians quickly identify the correct circuit. The color coding system used in the 2000 Chevrolet Silverado 1500 wiring diagram is based on the following conventions: Red: Power (Battery Positive) Black: Ground.Dec 11, 2014 - Find out how to access AutoZone's Wiring Diagrams Repair Guide for GM Full-Size Trucks 1988-1998 . AutoZone's Repair Guides tell you what you need to know to do the job right. Explore. Vehicles. Cars. Read it. Save. ... 1998 Chevy Silverado. Chevrolet C10. Chevy Pickups. 1955 Chevy. Silverado Parts. Chevrolet Caprice.WIRING INFORMATION: 1992 Chevy Silverado Full-Size WIRE WIRE COLOR WIRE LOCATION 12V CONSTANT WIRE RED Ignition Harness STARTER WIRE YELLOW OR PURPLE Ignition Harness IGNITION WIRE PINK Ignition Harness ACCESSORY WIRE ORANGE Ignition Harness POWER DOOR LOCK (2-door models: 5-wire reverse polarity, 4-door and models with Mar 11, 2022 - Diagrams here: https://imgvehicle.com/chevrolet/silverado-ii/fuse-boxGood Old Pickup Truck Is A 2007 Chevy Silverado 1500 Good Old Pickup Truck Is A ...Before you dive in with a multi-meter, you will want to obtain a free wiring diagram for your specific model. You may need to locate a specific color wire and its exact location. This is tough to do without a wiring diagram to help guide you through your diagnostic procedure. Find the free GMC wiring diagram you need and get started repairing ...Use the wiring diagrams to determine what the circuit is doing, where the problem most likely is occurring and where the diagnosis will continue. 4. Isolate the problem area. 5. Repair the problem area. 6. Verify the proper operation. For this step, check for proper operation of all items on the repaired circuit. Refer to the wiring diagrams.2001 CHEVROLET SILVERADO WIRING DIAGRAM - Chevrolet 2001 Silverado question. Search Fixya. Browse Categories ... I need the wiring diagram for mass air flow sensor on a 2001 chey silverado 1500 4.8. Posted on Apr 10, ... images for 2000 Chevrolet Silverado Wiring Diagram Google. Posted on Sep 03, 2009.Does anyone have a wiring diagram for the AC system. thanks . T. texlurch Old fart on a hill. Joined Apr 10, 2014 Posts 65 Reaction score 0 Location Lake George. Apr 17, 2014 ... Jul 26, 2000 Posts 13,663 Reaction score 5,493 Location Keweenaw. Apr 18, 2014 #9 Yes. Just jumper it for a few seconds. If the clutch engages, then your A/C wiring is ...The low and high side have sensors that can keep the compressor from engaging. The high side sensor is on the high side hose in between the evaporator and condenser. Jump across the 2 wire sensor to see if the clutch engages. Here are the wiring diagrams for the air conditioner system to the automatic and manual.The 2000 Chevrolet Silverado 1500 wiring diagram also includes wire colors. Knowing the wire color of a component can help technicians quickly identify the correct circuit. The color coding system used in the 2000 Chevrolet Silverado 1500 wiring diagram is based on the following conventions: Red: Power (Battery Positive) Black: Ground.Web all wiring diagrams for chevrolet silverado 2000 1500 model cars er motor circuit diagram 1996 12022 chevy gmc pick up 12022 2002 silverado remote start w. Web the 2000 silverado ac wiring diagram is a detailed guide to understanding your truck's air conditioning system. Web Air Conditioning Compressor Wiring Diagram For Chevrolet Silverado ...To access the wiring diagram for your 1997 Chevy 1500, you'll need to obtain a copy from a Chevrolet dealer or online retailer. The diagrams can also be found in many printed repair manuals and service manuals. Once you have the diagram in hand, you can begin to analyze what each wire and component is connected to.See the wiring diagram for that setup below. Or, carmakers can supply power to the motor and control blower speeds on the ground side of the circuit. See the wiring diagram for that setup below. Or, carmakers can opt for a motor resistor AND a high speed relay. See the wiring diagram below for that setup.The 2002 Chevy Silverado 2500hd wiring diagram is an essential tool for anyone who needs to repair or troubleshoot the vehicle. This diagram provides a comprehensive overview of all the major electrical components and systems in the truck, allowing auto mechanics and do-it-yourselfers to quickly diagnose and repair issues.Here are some tips for reading a wiring diagram for the Chevrolet 3500: Look for labels on the diagram. Labels indicate the name of each component, as well as its function. This makes it easier to identify which wires are connected together. Pay attention to the colors of the wires. Different colors often indicate different functions, such as ...On Silverado’s and Sierra’s the engine fuse box is located on the right side of the engine bay when facing it, close to the top right corner. See the below picture for the location on 1999-2006 trucks. Note that this is what it looks like with the fuse box cover off. When you open your hood, this will have a plastic covering over it which ...Fig. 2000 C1 CONNECTOR; Fig. 2000 C1 CONNECTOR (continued) Access our Avalanche, Sierra, Silverado, C&K Series, 1999-2005 Powertrain Control Module (PCM) Repair Guide by creating an account or signing into your AutoZone Rewards account. Once you sign in, follow these instructions to access our Repair Guides. Add your vehicle in Manage My Vehicles.The previous owner did lots of mods with the wiring and I am spending my down time cleaning it up. He actually wired the headlight with 3 black wires after replacing the connector. Lots more examples to be had. Canadian, V Star 650 Classic. Kuryakyn Hypercharger.The 2000 Silverado AC Wiring Diagram is a valuable asset for anyone looking to repair or replace their vehicle's air conditioning system. This diagram provides detailed information about the wiring of the system, including the power and signal paths that run between various components in the system.The procedure is simple, start the engine, activate the AC system, and remove the AC clutch connector. Measure the voltage coming to the connector with a multimeter, and if everything is activated properly, you should see 12 to 14 volts coming to this wire. If there is a ground wire, you should also check the ground.The wiring diagram for the 2000 Silverado AC compressor includes two types of connections. The first type is a series of numbered points, which indicate where each wire should be connected. The second type is a line drawing of the wiring schematic, which shows the location of each wire and its respective connection point.2000 Silverado Ac Diagram. Posted by Ac Diagram (Author) 2023-09-25 2000 Silverado Ac Wiring Diagram. Chevrolet Silverado Actuator Air Conditioning A C. I Have To Replace The Coax For The Antenna On My 2000 ...Here is the cooling fan diagram for my 2000 corvette.. The dark blue wire is mislabeled and is high speed control. I believe we share the same gen 3 ecm and these are the correct ecm pins and diagram you should try to rebuild. Once that is done you will set low and high speed on and off temps in hptuners. 10-09-2016 #3.Feb 15, 2015 · Click the button below and we will send you an exclusive deal on this book. Upgrading to Gen III LS-Series PCM: Air Conditioning Guide includes instructional photos, checklists, and step-by-step instructions on upgrading to the GM Gen III LS-Series PCM, ECM, Electronics, and POWERTRAIN CONTROL SYSTEMS. Chevrolet Silverado 1500 2003 – ALL WIRING DIAGRAMS. Home CHEVROLET Chevrolet 2003 Chevrolet Silverado 1500 2003. AIR CONDITIONING – Chevrolet Silverado 1500 2003 – SYSTEM WIRING DIAGRAMS ANTI-LOCK BRAKES – Chevrolet Silverado 1500 2003 – SYSTEM WIRING DIAGRAMS ANTI-THEFT – Chevrolet Silverado 1500 2003 – SYSTEM WIRING DIAGRAMS ... PONTIAC Car Manuals PDF & Wiring Diagrams above the page - G3, G5, G6, G8, GTO, Firebird, Grand Prix, Montana, Solstice, Torrent, Vibe; Pontiac EWDs.. Pontiac Motor Company took its name from the city of Pontiac, Michigan, where the Edward M. Murphy first created the Pontiac Buggy Company in 1893.. The company initially specialized in the production of horse-drawn carriages.The 2000 Silverado has multiple BCM wire voltages that help to regulate the electrical system. The main BCM voltage is 12 volts, which is used to power the instrument cluster, engine control module, and transmission control module. Additionally, there are several other voltages that range from 5 volts all the way up to 14 volts.Fuel Pump Wiring Diagram (1999-2002 4.8L, 5.3L Silverado/Sierra) August 19, 2020 Updated: December 16, 2022 By: Abraham Torres-Arredondo Article ID: 1158 APPLIES TO: This simplified fuel pump circuit wiring diagram applies to the following vehicles:3-Wire-Coolant-Temperature-Sensor-Wiring-Diagram. The two wires, a “5-volt reference”, and a “ground wire” go to the ECU, and the third wire “Earth 1-Wire for Temp Gauge” goes to the cluster-mounted temperature gauge by providing an earth link to the temperature gauge. In three-wire coolant temp sensors, the ECU does not control the ...Hi Greg, Thanks again for your help. I screwed up my courage and connected +12V to the ORG and BLK wires in the connector in the front of the seat, and, lo and behold, the seat motors worked. The UP/DOWN, FRONT/BACK, TILT switches worked and the motors spun. It must be a memory seat, because there is a 4-way switch (kinda round) at the back of ...The 2000 Chevy Silverado stereo wiring diagram color code is a helpful tool for quickly identifying the right wire for the job. It includes the schematic color codes for the power, ground, speakers, and other major components. This makes it easy to tell which wires are connected to the stereo and which ones should be kept separate.Load vehicles, quick warm ups, and improved AC performance. Scope The GM (UF3) option described here is the necessary electrical and electronic content to control the engine idle speed. This is not a description of how to install these features if not ordered as part of the option. Base factory settings and procedures to change the factoryAutomotive Tech. Vocational, Technical or Tra... 43,944 satisfied customers. 1998 Chevy K1500 5.7 Liter wont start in rainy, humid and. 1998 Chevy K1500 5.7 Liter wont start in rainy, humid and low barometric weather. Has a disabled Clifford Intellilgard I.Q.900 Aftermarket Security … read more.Unlimited access to your 2000 Chevrolet Silverado 1500 manual on a yearly basis. 100% No Risk Guarantee. We'll get you the repair information you need, every time, or we'll refund your purchase in full. This manual is specific to a 2000 Chevrolet Silverado 1500. RepairSurge is compatible with any internet-enabled computer, laptop, smartphone or ...2006 Chevy Silverado Air Conditioning Wiring Diagram2006 Chevy Silverado Air Conditioning Wiring Harness2006 Chevy Silverado Air Conditioning Service Manual2...A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!on axle shaft boot to protect boot during repair. Detach and depress brake caliper piston, and wire aside. Remove brake rotor. 2. Remove cotter pin and retainer (if equipped) from axle shaft nut. Remove nut and washer from axle shaft. Remove cotter pin and tie rod end nut. Separate tie rod end from steering knuckle.Yup. The blower motor resistor and futile attempts at the climate control swap are posted pretty much biweekly. ΜΟΛΩΝ ΛΑΒΕ. SOLD: 2001 Chevrolet 2500HD 6.0 8" 5.13s 38s. 1978 K30 Dually. 1967 C10 5.3 LM7 3 On the Tree :secret: 1969 K5 Blazer work in progress. 2000 Ford F250 RCLB 7.3 6spd. .Wiper/Washer Wiring Diagram for Chevrolet Silverado 1999 1500. AIR CONDITIONING 4.3L 4.3L VIN W, Compressor Wiring Diagram for Chevrolet Silverado 1999 1500 4.3L VIN W, Heater Wiring Diagram for Chevrolet Silverado 1999 1500 4.3L VIN W, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 1500 4.3L VIN W, Manual A/C Wiring Diagram, Up ...1. Describe the meaning of the "C13" in the diagram component Q. 2. Describe the meaning of the "G-W" in diagram component R. 3. Describe the meaning of the "2" in diagram component S. 4. Describe the meaning of the "S/D" in diagram component T. 5. Describe and identify the diagram component U. 6. Describe and identify the diagram component V. 7.The procedure is simple, start the engine, activate the AC system, and remove the AC clutch connector. Measure the voltage coming to the connector with a multimeter, and if everything is activated properly, you should see 12 to 14 volts coming to this wire. If there is a ground wire, you should also check the ground.The wiring diagram for your 2003 Chevrolet Silverado provides specifications related to individual systems, such as: Ignition switch. Electronic speed control module. Body control module. Heating and air conditioning controls. Radio, speaker and power antenna (amplifier) connection. Maxi fuse and relay center.Version. Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 1999-2002 Chevrolet Silverado . This information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle. Please be sure to test all of your wires with a ...Free Chevrolet Wiring Diagram!AIR CONDITIONING - Chevrolet Silverado 2500 2000 - SYSTEM WIRING DIAGRAMSANTI-LOCK BRAKES - Chevrolet Silverado 2500 2000 - SYSTEM WIRING DIAGRAMSANTI-THEFT - Chevrolet Silverado 2500 2000 - SYSTEM WIRING DIAGRAMSBODY COMPUTER - Chevrolet Silverado 2500 2000 - SYSTEM WIRING DIAGRAMSCOMPUTER DATA LINES - Chevrolet Silverado 2500 2000 - SYSTEM WIRING Chevrolet Silverado 2500 2000 – ALL WIRING ...2000 Silverado AC system circuit check. A complete low pressure cycling switch test2000 Silverado low pressure cycling switchhttps://amzn.to/39kkGwN2000 Silv...Also, if you smell burning plastic or smoke begins to enter the cabin when the blower is going, that is also a sign you have a faulty blower motor. Finally, if you hear that the blower motor is still running even when the Silverado ignition is in the “off” position, chances are, your blower motor needs replacing. Figure 1. Test your HVAC ...The first thing to check if your compressor will not engage is the electrical system. Check the fusebox first, which is located under the hood near the driver’s side fender on 1999 through 2010 Silverado model years and on the left side of the instrument panel on older models (refer to your owner's manual). Locate the red 10 amp fuse marked A ...The wiring diagram for the 2003 Chevy Silverado ac is divided into three sections: the main power distribution system, the Recharging, Starting and Auxiliary Circuits, and the Grounds. The Main Power Distribution System allows users to see which circuits are powered directly by the battery and those which have auxiliary functions.2002 chevy duramax. tuned by brayden fleece, 68 mm cheata turbo, modded lbz cp3 pump, injectors, lift pump, suncost stage 5 trans, cogneto front end, pro comp ladder bars, sitting on KMC XD 20s rapped in 36 inch terra grapplers. The wire should be at least 6 inches away from the compressor. It's usually 6 inches long.Chevrolet Silverado 1500 2000 - ALL WIRING DIAGRAMS. Home CHEVROLET Chevrolet 2000 Chevrolet Silverado 1500 2000. AIR CONDITIONING - Chevrolet Silverado 1500 2000 - SYSTEM WIRING DIAGRAMS ANTI-LOCK BRAKES - Chevrolet Silverado 1500 2000 - SYSTEM WIRING DIAGRAMS ANTI-THEFT - Chevrolet Silverado 1500 2000 - SYSTEM WIRING DIAGRAMS ...1997 Chevy Silverado Ac Wiring Diagram. ... 1 testing fuel pump relay 12022 pick up suburban er motor circuit 1996 classic 2007 system cars need blazer k1500 1998 2000 tahoe yukon cadillac escalade newrockies inc diy walkthrough vcm ecu ground wire update ck series trucks hvac control unit sierra 1981 truck 1947 present message board network ...The 1997 Silverado AC wiring diagram is also useful for identifying potential problems in the system. Knowing what each component does and how it connects to other parts can help you spot problems before they become serious. ... Chevy Cavalier And Pontiac Sunfire 1995 2000 Wiring Diagrams Repair Guide Autozone. Ac Compressor …ModifiedLife. June 6, 2011 at 11:03 pm. Joshua, run a primary wire from the back of your radio to your steering column and use the white/red wire in the ignition switch harness. This white/red wire will provide a switched power source for your 2008 Chevrolet Colorado stereo.A while back, I stumbled upon a COMPLETE service manual for the S-series trucks. I believe these are GM manuals as they go into crazy step-by-step detail with the complete procedure and torque spec documentation. The PDF files were broken up into sections so that I will post them in the appropriate areas. If the following links do not work, let ...White / 10 Gauge. Blue / 14 Gauge. Green / 14 Gauge. Black / 10 Gauge. Red / 10 Gauge. Brown / 14 Gauge. Ye, 2001 Chevrolet Silverado Fuse Diagram Underhood Fuse Box. ... (Hi and Low) , See the wiring diagram for that setup below. Or, carmakers can supply power to the, The ac diagram shows a light green wire from the ac switch going to the low pre, 2000 Silverado AC system circuit check. A complete low pressure cycling switch test2000 Silverado low pressure cycli, Chevrolet Silverado 2500 2000 - ALL WIRING DIAGRAMS. Home CHEVROLET Chevrolet 2000 Chevr, Mar 28, 2022 · 2000 Silverado Ac Wiring Diagram. By Christ Joe | March 28, 2022. 0 Comment. The 2000 Silverado AC , Fig. 4: Chevrolet Silverado 1500 1999 - Component Locations - T, 2000 Silverado Ac Diagram. Posted by Ac Diagram (Author) 2023-10-, Oct 5, 2020 - 1994 Chevy Truck Wiring Diagram Free . 1994 Chevy , For the 2000 Chevrolet Silverado 1500, the symbols and label, The first step to understanding a tail light wiring diagram f, Load vehicles, quick warm ups, and improved AC perf, For those who are unfamiliar with wiring diagrams, the 2000 Chevy, I've attached the 1990 and 1994 Chevrolet truck instrument, Get Access all wiring diagrams car. Manual A/C Wiring Di, Workshop and Repair manuals, Service & Owner', Testing high pressure switch. 1. With key on, disconnect .