Having problems with your Cars & Trucks ?


Posted / edited by AnonymousUser on : 15-01-2018

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Repair Help & Product Troubleshooting for Cars & Trucks

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... Cars & Trucks

Hello I have a 2000 Silverado and am having an issue with the AC blowing hot. I jumped the pressure switch and the clutch engages. I believe that the pressure is low but trying to find out do I test the pressure with the AC running? I have gauges but not sure what is the proper way to check. Does the clutch need to be running.... as it will kick on and then kick off in about 10 sec. If I jump it it runs continuously and there will be frost on either side of the Low pressure port. Also I re

Hook up manifold and open port valve (at hook up ends\015\012make sure that manifold valve hi is shut open low side only \015\012start engine switch a/c on max and blower motor to high and read pressures \015\012its sounds like syst ... 2000 Chevrolet Silverado

I am trying to repair my 95 Camaro. The compressor has cycled off due to a low charge. The repair manual says if the clutch cycles off, pull the low-pressure cycling switch plug from the evaporator inlet line and attach a jumper wire across the terminals and this will keep the compressor on. My problem is I cannot find the low[pressure cycling switch plug. Can you help?

Evap inlet is the line running from the radiator area to the firewall. Follow that until you see something hanging on the side--could be on the dryer or line on either side of the dryer. Connector will have 2 wires--make a small shorting wire and p ... 1995 Chevrolet Camaro

03 gmc envoy with 5.3 140000 miles. Oil pressure reading fluxuates between 0 and 40. When problem first started pressure read 80. When vehicle was new it stayed at midpoint (40) vehicle has plenty of oil. if you rev engine or increase rpms it goes to 0 and stayes there. let off and it jumps around like it did when started (0 to 40). No engine pecks while running. Display indicates low oil pressure and stop engine. orange light (check gages) comes on when at 0. any ideas. Service engine has not c

There may be a loose wire or the gauge or sending unit may be going bad. The first thing I would do is to hook up a temporary oil pressure gauge, not using the old one at all. With this watch gauge while driving and see what readings you get. If the ... 2003 GMC Envoy Xl

Air 96 ford e350 van no power to compressor pump clutch wires fuse is good low pressure switch wire ireads 12 volt i jumped these still no power to compressor is there a switch between low pressure sw. and comp. clutch.

There is a relay, refer to the owners manual for location in the under hood fuse and relay center. ... Ford E-350

2002 dodge caravan 3.3 w AC cluth not energizing, Low guage is 110 high is 75. 1. What wires can be jumped on the low pressure switch? to energize the AC clutch? I have low pressure and can not add freon. 2, any easy way to run 12vdc to the clutch diretly , can not reach wire bundle easy.

... 2002 Dodge Caravan

Where is the low pressure service port on a 2002 gmc 2500hd with 6.0L? Can I "jump" the low pressure switch to activate the clutch? Thanks...

Always check the thick pipes vs. the thin pipes for the ow pressure service port. \015\012\015\012Also, it may have a blue cap on it from the factory.\015\012\015\012Also, it may be on the receiver/accumulator which looks like ... Cars & Trucks

Codes are: P0700 P0706 P0755 in limp mode, OD pressure switch is closed, C3 volts 0 , low reverse pressure switch is closed. My car runs great but will not shift gears. It will go into reverse and drive just fine though. We had just replaced the heater core the day before this problem happened.

... 2004 Dodge Neon

2000 Z71 air conditioner runs ok for 2 blks or 2 miles & comp quits. Will re-engage after cooling and using on-off switch. Pressures good,hi & low pressure switches jumped, relay in fuse box replaced, clutch replaced with no better results.

... Chevrolet Silverado 2500HD

Need wiring diagram 4 a/c clutch it will not engage has freon jumped low pressure switch has voltage to low switch

... Cars & Trucks

Fuel problems 1999 Grand Prix GTP 3800 Supercharged VIN 1: car starts, but shuts down within 10 seconds. You can see the fuel pressure drop within those 10 seconds. If I flutter the throttle, the fuel pressure will jump back up to 50lbs & back down to 0-10. But, you can keep the car running by doing that. I have replaced the fuel filter & helped a little bit, but still shuts down. Replaced fuel pressure regulator & fuel pump & oil pressure switch & still nothing. HELP....

T.p.s. censor ... 1999 Pontiac Grand Prix

Where is the low pressure switch that tells the compressor to kick on when chargein system? U can jump power to the compressor to kick it on...fuse is good....have power comein from switch n dash....switched relays

... 1993 Honda Accord

Low refrigerant prevents the a/c pump from kicking on due to the low pressure switch. i would try to fill with a can of R134 (refrigerant) from the auto parts store. the low pressure switch may have gone bad. When applying the R134 refrigerant, where does it go? Can i do it myself. After applying the regfrigerant and if that does not help could it be the low pressure switch? If the low pressure switch is gone is it expense to repair.

Low pressue switch rarely, if ever go bad. Do not mix 134 with r-12. Ck twhich one the system uses.\015\012Servicing the A/C - Kits are sold at auto parts stores. While there, ask the counter person if he would show you the connection port ... 2001 Oldsmobile Aurora

1995 dodge caravan, 3.0 engine, I just installed new compressor with new clutch, accumulator, and expansion valve. Obviously there is no refrigerant in system. Clutch will not engage.There is no voltage to it. I jumped the low pressure switch and the electronic cycling switch and have checked the relay and fuse. Still no power to clutch. I know the clutch works by temporarily wiring direct to battery. What next?

Get a haynes book, they provide wiring diagrams in the back of the book. You will then be able to troubleshoot the clutch wiring. ... 1995 Dodge Caravan

2005 Cadillac Escalade oil pressure temperature gauge keeps setting off alerts alarm gauge jumps from 0 to full & truck shifts hard while driving like its going to stop, like its transmission problem. All fuel levels are full no problem there. Tire pressure gauge keeps reading a have low tire as well.

... Cars & Trucks

My 1998 gmc shows low oil pressure when idle, but jumps up to normal when running on road, could it be oil pressure switch?

... 1998 GMC Sierra

Put in a new dash control panel,new pressure switch,full of freon.fuses and relays are good. jumped low pressure switch.still no power to ac clutch. HELP..

Well here's the theory firstyou PCM (powertrain control module) decides when and IF it wants the A/C compressor to runwhen the PCM wants the compressor to operate it supplies a GROUND for the A/C relayTherefore... ... 2003 Jeep Liberty

My 2004 chevy 1500 v8 air compressor will not kick in. I have jumped the low pressure switch and the compressor will not come on. i have changed the temperature controller and still won't kick in. i have jumped the contacts with the relay removed and the compressor will kick in. i swapped the relay and the compressor will not kick in.... I was told that the computer could be holding the compressor out for some reason. i asked AutoZone to read my codes and they said since there is not a ser

... 1996 Chevrolet Tahoe

2004 yukon denali with low oil pressure message. Gage reads 0 at idle and about 20 driving. Changed oil pressure switch and oil pump. Problem persits. Now i have a nocking on engine. Out of ideas.

... Cars & Trucks

Oil pressure goes to 0 at low rpm (idle) goes up with rpm. what other causes can it be other than pressure switch?

Well the only other thing it can be related to is the oil pump and or oil pump pick up. you could have sludge in the pan and the pick up screen is having a hard time passing the oil. but most common with these engines are the pumps getting weak. ... 1999 Lincoln Navigator

On the compressor cycle switch on the low side pressure of my a/c it has three wires.To make the compressor start which wires need to be jumped to make compressor run? it has low freon

What year model, engine size? if you have low freon need to charge up switch is designed to cut out compressor so it doesnt get damaged from low refrigerant,as the oil is carried with refrigrant low freon means low oil traveling thu system ... Dodge Ram 2500

2004 yukon denali with low oil pressure message. gage reads 0 at idle and about 20 driving. changed oil pressure switch and oil pump. problem persits. now i have a nocking on engine. out of ideas.

If pump and switch are new, check the pick-up tube. Most problem causing device.Do a compression check to make sure you don't have any leaking gaskets.If you have alot of miles, worn oil rings on the pistons can cause this. I would ... GMC Yukon Denali

AC clutch wont kick in.I replaced clutch relay.Tried jumping low pressure switch still nothing pressure in system is fine.

Test the clutch manually with a hot wire ... 1996 Pontiac Trans Sport

I have a 2000 Chevy Tahoe Z71 old body 5.7L engine it was parked for one week and the a/c compressor clutch does no kick on the a/c light comes on when the switch is on i tried to jump the low pressure switch and did nothing

Check for power at compressor to eliminate it,if you have power at plug the compressor is bad,then you need to make sure the system if full of freon,it won't kick it will low freon ... 2000 Chevrolet Tahoe

1988 Trooper 2.6L 4ZE1 I have no power going to the Low Pressure Oil switch. where does the LPO switch derive its power from? This happened once before and the low Pressure oil switch was the problem. I replaced the LPOS with a new one and the car ran fine until my wife ran it out of gas after she put gas in the tank the car failed to start and I am not getting any power to the Low pressure oil switch now The Circuit diagram shows it coming from the instrument cell cluster. According to t

Hi,Normally there would be a relay for the fuel pump. It would be among a few others in the fuse/relay box under the hood. Pls confirm with your diagram and to my knowledge, this gets its main power from the FL-3 ECM fuse (30A) and ... Isuzu Trooper
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