Question about Jeep Grand Cherokee

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Working on ac system for 99 jeep GC jumpering wire to find why ac clutch not getting power. left over night with battery off. next moring put back together and key will not start jeep. sentry key icon is on. did key go bad or did i fry something

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  • longdingo81 Jul 19, 2010

    unlocking the drivers door did the trick. had to do it a few time so the arlam would stop going off
    thaks so much



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That happens sometimes, unlock the rear cargo door with the key to reset the alarm.

Keep me posted!! Good Luck!!

Posted on Jul 19, 2010

  • longdingo81 Jul 19, 2010

    can not unlock rear door only door lock is drivers side door



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2 Answers

2006 Jeep Liberty ac not working,fuses are fine,relay good replaced low and high pressure switches refrigerant level is good still won't work

Check for battery voltage on the dark blue/yellow wire in the connector at the AC clutch with engine running and AC on. If no voltage, yank the AC relay and check for battery voltage on terminal 86 in the relay socket. If no battery voltage on that terminal, check fuse 21. If yes, check for ground on terminal 85 in the socket. If no ground, then PCM isn't commanding the AC clutch on. Check for voltage on the dark blue/yellow wire at the low pressure switch and good ground on the black wire. The PCM provides power to the low pressure switch which then goes to ground. The PCM is looking for a large voltage drop if pressure is above 34-38 psi. If pressure is below that, the switch will be open, so the PCM won't see a voltage drop and will prevent AC clutch operation. The high pressure switch should be closed at pressures below 270-330 psi

Nov 30, 2017 | Jeep Cars & Trucks

1 Answer

2007 jeep gc won't start. Lights, battery all Dash lights had been acting strangely before this happened. Turned the car off, Swapped AC relay with starter relay and nothing.

i guess you mean starter is dead, and all lights dead.
pointing to....
the battery is dead, did you jumper cable start it?
if that works the battery is bad, dead or only dischanged.
if that dont work make sure the battery cable lugs are cleaned.
no rust on cable ends( that green junk there that all cars get)
if the head lamps die (they work key off so...)
then the battery is dead, or rusty lugs.
if battery is dead, charge it. using a charger.

Nov 08, 2015 | Jeep Cars & Trucks

1 Answer

Pull jb power fuse15 stop drain no fan controls or radio

i cant under stand any of that.,i get JAB, and fuse 15
  • is this ?
  • battery drains over night? why did you say drain,if not.?
  • fuse 15 is ok. wild guess, sure, lots of loads, only a few fuse.
  • Hvac blower dead,
  • Radio dead
  • yes, the FSm does cover all that. sure.

id do the radio,so simple. 1 wire. for power, one fuse,
toss coin
03 GC WJ jeep it is zzzzz, slow internet on the beach
cant open free FSm. grrrrr
got it
jb f5 and 30 is Radio
f5 is only memory so fuse 30 is blown, why not test all fuses, keyon, 12v on both sides, and forget books. this works.

the blower is more complex. (controls)'

blower is pdc f1
and jb 20
looks yourself

free,posted over 100times now under GC

Jan 17, 2015 | 2003 Jeep Grand Cherokee

1 Answer

No power to AC clutch 1994 olds cutlass ciera 3.1 litre

Have you tired jumping the AC compressor low pressure switch?

May 25, 2012 | 1994 Oldsmobile Cutlass Ciera

1 Answer

Ac was working fine the night before. left the next mornng ac clutch will not engage. system was checked. freon pressure is good. checked fuses, all good . checked ac clutch fuse under hood . ok. replaced...

Check the low switch by the dryer or accumulator, its a long narrow cannister,

it will have a pressure switch attached to it or near it. put your, ac on high,

pull the molex off the switch and jump the molex with a wire or paperclip,

if the compressor comes on and the ac starts to cool, you will just need

to replace the low pressure switch, if the clutch does not come on,

check the low switch molex to see if there is 12vlts there. good luck!

Jun 28, 2011 | Buick Regal Cars & Trucks

2 Answers

Ac clutch squeals when i hit the gas no matter if ac is on or off but not at idle 98 jeep gc 5.9 need steps to replace clutch assembly

Are you certain that it's the clutch assembly?
Check the idler pulley. Poor tension in the idler pulley spring will cause the belt to squeal AT THE ALTERNATOR, and it may sound like it's coming from the AC.
The AC pulley typically "freewheels" when the AC is not on and the engine is running.
Have someone turn the AC on and off while the engine is running and watch the operation of the AC clutch. If it's working properly, the clutch should "click" and the back part of the pulley should start turning or try to turn.
If the squealing noise continues when the clutch is freewheeling, it's probably the idler pulley. If the AC Pulley won't start freewheeling, it's probably the clutch.
To remove the clutch system,
  • disengage the idler pulley and remove the serpentine belt from one of the pulleys.
  • rent, purchase or borrow a puller from a local auto parts retailer (Auto Zone and O'Reilly auto parts are both helpful)
  • some of the clutch systems have retaining bolts, some are just pressed in, figure out what you have before removing the clutch assembly using the puller.
  • The puller is also designed to help put the NEW clutch assembly back on the shaft.
The idler pulley assembly is a lot easier to replace.

Feb 19, 2011 | Jeep Grand Cherokee Cars & Trucks

1 Answer

How do I test the elec. motor and the fan relay on my '99 Jeep Cherokee Sport?

with an ohm meter check if the wires going to the relay have power when they should. next use a jumper wire from the pos. battery terminal to the power connector on the fan if the fan starts to run off the jumper then its probably the relay to blame. hope this helps.

Nov 13, 2010 | 1999 Jeep Cherokee

1 Answer

2005 Jeep GC with 4.7. A/C compressor will not run.

Check the low pressure sensor and the hi pressure sensor to be sure they are operating properly. Also check compressor relay and all fuses.

Jul 23, 2009 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Ac low on 99 devill

You have to make a jumper wire to put in the plug of the wiring that hooks on the pressure switch. This will kick on the compressor, and enguage the clutch on the compressor. Then you van charge the system.

Feb 09, 2009 | 1997 Cadillac DeVille

1 Answer

1999 jeep gc 4.7 turn signals not working

check your charging system and battery. Low voltage will give both the symptoms you listed. As you drive, some recharging will return system to near normal, till it sits again. I'd pay close attention to alternator output...You may have one bad diode. This added to a battery with low capacity will look the same as what you listed.
To make a "quick check" put a set of jumpers on it and connect to another battery. If directionals work properly then check everything I've said. A "alternator "quick check" is to put a voltmeter across the battery. Running with no accessories on you should see between 13.5-14.0 volts. With accessories on including lights on hi-beam, you should see no less than 12.9 volts and after a few minutes voltage should not fall off. Your battery should read no less than 12v after standing overnight (slightly less if near 0 temps)but definitely not less than 11.9. Also, make sure alternator drive belt is sufficiently tight and not slipping.

Jan 16, 2009 | 1999 Jeep Grand Cherokee

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