Question about Jeep Grand Cherokee

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

2005 GC with 4.7. A/C compressor will not run. Cooling system was losing charge, replaced leaky transducer. System fully charged, but compressor still not coming on. Pulled plug on clutch and ran battery voltage to it, compressor runs and system blows cold air. All underhood fuses and relays checked out ok. Where should I look next for problem?

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  • 335 Answers

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

Posted on Jul 23, 2009

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Posted on Jan 02, 2017

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1 Answer

Firing order jeep Cherokee 2004 3.7 l v6


are you doing spark or timing a cam? what? what is JOB?
it dont matter, the engine, ecu does that, (magic)
but if it has a coil pack like my 3.8 then the coil pack must
be wire right and is marked. clearly on the pack.
they have USA jeeps and Export. country never stated here. sad huh?
and use differnent spark systems (3 types used, but 2 common)
per below.

v6.
is this not a Cheokee? the non Grand ended in 2004. so...
ill go with GC 2005, v6 3.7L
the v6 began in 2005, not 2004, but, maybe yours is the first./

the 3.7 has coil over plug, spark, 6 coils.
and the harness is fixed to those coil so all firing order are
dictated in the ECU/PCM (hard coded)

VIN engine code, K. (not stated)
http://www.fixya.com/cars/t13893405-firing_order_diagram_3_7l_jeep_2006

and already asked, and answered .

my 3.8 (2004) jeep.
is 1,2,3,4,5,6
and is like this.

mine uses wasted spark system.

http://www.fixkick.com/look/odds-ends/jeep/2008-JK/slideshow/firing-order.JPG


so post VIN, or tell what engine is really there.
and the true year. or build date (sticker)

so my answer is.. 2005 GC, 3.7L V6, not I-6
it has 6 cops, "coil over plugs" 6 induction coils
and runs same firing order, as the old I6 did.
1-5-3-6-2-4
but the I6 4.0liter runs a coil pack and is quite different.
these;

25312317-ojiabjcoymo5cw32jzjg31w5-2-0.gif
times 6
all laced in, hard.

Dec 07, 2014 | 2004 Jeep Grand Cherokee

1 Answer

2005 Jeep Liberty Cooling Fan - Run full time with the A/C on?


When your idling at a stop or parked an the engine is running A/C on cooling fans should be running . When your driving down the road air flow through the condensor is good enough and the fans don't run .

Aug 13, 2017 | Jeep Liberty Cars & Trucks

1 Answer

2005 Jeep GC starts and Dies


What gets you another chance at starting it? Do you have to wait

Feb 10, 2013 | 2005 Jeep Grand Cherokee

1 Answer

2005 Dodge GC SXT - A/C does not work


mobile ac systems can lose up to a 1/2 pound of freon a year and be normal. they normally don't but when the freon gets too low the compressor does not run to protect it from damage. you probably just need some freon and it will be ok. the mechanic you talked yo is trying to cheat you . need to find another one - this is not hard to do. takes me 1/2 hour and i usually charge 50 to 75 to do it. freon cost a shop $3 a pound shen bought in bulk. you may need 2 pounds at the most to get running. you could try this yourself. if so get back with me and i will tell you how to or find another shop that is more in line with the prices i charge. good luck

May 22, 2010 | 2005 Dodge Grand Caravan

1 Answer

04 Jeep Grand Cherokee Overheating


long answer but should get you solved.

You know for some reason jeep eliminated the FC relay for some models and now relies on the computer to determine when and at what speed the fan should run based on coolant temperature inputs and A/C compressor status. If the fan is not working properly i would consider replacing the fan,
"I have a 04 GC also with the 4.0 and I could not find my FC relay either. Nobody at a local dealer here had ever heard of this phantom FC relay problem. I was able to find an electrical diagram on the web that does not show the FC relay for the 04 GC but that was it. The diagram only showed the PCM and two relays in the PDC near the battery. My GC was overheating now and then. It would seem to overheat when you were in stop and go traffic or letting it idle. I was not losing any coolant so I replaced the thermostat but that did not fix it. After much frustration I started the engine and sat there and watched it run until it began overheating. I paid particular attention to the fan. When the engine began to overheat the fan was barely spinning and would even shut off at times during the overheating. I knew this was not right so that is when I began this search for the FC relay but I could not find it. I disconnected the fan and did some checking on the two speed electric radiator fan. It has a 3 pin connector where the center pin is ground. When I ran power to one pin and grounded the center pin the fan would run. However when I switched the power to the other pin I got nothing. I had already checked operation of the Low and High Speed relays in the PDC near the battery and all checked out so I went and picked up a new radiator fan assembly and installed it. That was yesterday and that fixed the overheating problem. I have concluded that for some reason jeep eliminated the FC relay for some models and now relies on the computer to determine when and at what speed the fan should run based on coolant temperature inputs and A/C compressor status. I also found out that although my GC does not have the towing package it does have the max cooling package. When I went looking for a new motor for the radiator fan at local auto parts store I was asked if it had the towing package and I answered no. Everytime I did they would bring out a motor that only had a 2 pin connector. Not one of them kept the motor that would be needed if you had the towing package. I bet if they did it would have a 3 pin connector on it. So while my GC does not have the towing package I think it has the max cooling package that usually comes with the towing package. I think the standard cooling package uses a one speed fan where the max cooling package uses a two speed fan. It may be that the standard cooling package uses the FC relay which is supposed to be under the passenger headlight but the max cooling package eliminates the relay and uses the PCM to control two relays in the PDC which in turn run the fan. One more thing....replacing the radiator fan assembly involves removing the shroud. One of the 4 screws that holds the shroud is in a very tight space. I fianlly got to it with a long socket extension and swivel. I know this is long but I hope it helps because I was very frustrated at the lack of informartion available locally and on the web in reference to this oddity" (article found on web)

Jun 30, 2009 | 2000 Jeep Grand Cherokee

1 Answer

Air conditioner only works while moving. The AC stops cooling when stopped and idleing. Anyone know what causes this?


Your freon level is low, and not circulating on slow compressor speeds. Stop by any shop that has a sign stating they work on a/c and they can recharge it for you in a few minutes. Here where I live they charge about $20.00 labor plus a charge for the freon they put in, they sell it by the pound.

May 25, 2009 | 2005 Jeep Grand Cherokee

3 Answers

Change a water pump


1. Remove negative battery cable
2. Open radiator valve - drain cooling system
3. Remove cooling fan and shroud
4. Remove belt
5. Remove water pump pulley from hub
6. Remove hoses from water pump
7. Loosen heater hose coolant return tube mounting bolt and nut.
8. Remove the tube. Lose the O-Ring.
9. Remove water pump mounting bolts
10. Loosen the clamp on the bypass hose.
11. Remove the hose as you pull the pump away from the engine.

Hope this helps

Mike

Jun 14, 2008 | 1994 Jeep Grand Cherokee

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