Question about 2004 Jeep Grand Cherokee

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P0505 I have a 2000 Grand Cherokee 4.7 liter with a factory towing package (transmission cooler) that was having cooling problems. The gauge is climbing gradually from normal 200F to about 240F and then returning to 200F. Air conditioning was not very cool either. When stuck in traffic temperature would rise and fall back to the normal range. Getting worse over the week and as the weather hit the upper 90s the engine seemed to start laboring like it was not cooling sufficiently and bogging down, engine light came on, seemed like it was going to seize up so I parked it and cooled it off. To my surprise I found out that it also needed an auxiliary electric fan and relay.Thought that would resolve the overheating problem for sure. Replaced the fan & relay, charged the A/C. Now I still have an engine light on (would not go off) and I not have a code P0505. Also, at idle I notice the engine seems to sound normal (idle is @ 700rpm in park) but when I turn on the A/C now I seem to feel a vibration in the steering wheel when I'm driving, its a harmonic vibration. When I turn off the A/C its not noticeable. Guy that did the work says its because of the code P0505. Says when the air is turned on the Idle Air Control is not sufficiently advancing to accommodate the added AC compressor drag. What's next??? Your thoughts are welcome Gentlemen. Regards, Tom

Posted by Anonymous on

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Posted on Jan 02, 2017

mook76
  • 79 Answers

SOURCE: 2001 jeep grand cherokee, 6 cylinder air conditioner will not cool

Try recharging the AC unit.

Posted on Jul 21, 2008

landsend
  • 1066 Answers

SOURCE: 2001Jeep Grand Cherokee electric engine cooling fan wont turn off

relay sounds stuck...call a parts store for pricing

Posted on Mar 21, 2009

  • 8 Answers

SOURCE: I am having a problem with my 2003 Grand Cherokee

no wiring problems sounds like a simple thermostat or maybe the coolant temp sensor the computer reads the cts and controls the radiator fan speed yes it can be bad and not set a code i worked at a jeep dealership for 8 yrs

Posted on May 06, 2009

yotaguy
  • 232 Answers

SOURCE: 94 jeep cherokee: check engine light code 35

No its not true,the cooling fan comes on when the coolant temp reaches a certain point it closes the switch in the temp sensor wich in turn closes the relay and powers the cooling fan,the reason it comes on with the A/C is that it's wired to bypass the temp sensor and associated relay because the A/C compressor forces the motor to work harder and the coolant temp to rise significantly faster,the relay needs to be replaced or you will overheat the motor and possibly cause serious damage.

Posted on May 30, 2009

  • 14036 Answers

SOURCE: Will a faulty MAP Sensor on a 1998 Jeep Grand

YOU HAVE INTAKE VACUUM LEAK AT THROTTLE BODY OR PCM HAS FAILED.NOT CONTROLLING IDLE SPEED CONTROL CIRCUIT.

Posted on Oct 06, 2010

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1 Answer

Foamy transmission fluid on a 1996 Jeep Grand Cherokee Laredo. What is the cause


Dear Jon,
The problem should be inside your radiator.
The transmission has a separate cooler mounted inside the radiator to cool the transmission fluid.
This is accomplished by having two steel & rubber lines that run from the transmission to the radiator and return.
If the cooler inside the radiator gets a hole in it, it will allow coolant into your transmission, since the radiator pressure can exceed the transmission pressure.
You will need to service both the radiator (replace it) and the transmission (flush it).
To neglect to do would will "burn up" the transmission" and can "blow up" the radiator as well.
The vehicle should not be driven at all until this is repaired.
It should even be towed to the garage.
God bless your efforts.

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1 Answer

Is transmission cooler factory installed or an aftermarket purchase?


if it has a factory tow package usually it already has a trans cooler installed it will be located in front of the radiator/ a/c condenser , if not there not that difficult to install

Jul 07, 2014 | 1999 Jeep Cherokee 4WD

1 Answer

Transmission cooler


Having once owned a trans repair shop I
would never tow with that transaxle or any
front wheel drive transaxle

You can look in the grill & see all the coolers
& follow the lines & tubing to power steering
& transaxle

NO factory cooler will be large enough for towing

Do you change your trans fluid every 3 years or sooner,
on ALL vehicles you have ever owned?

Death Sentence to any trans if you don't

Power Steering Fluids as well

You could pull a small trailer just to take leaves to
the recycle center but nothing else.

Those caravans need to come from the factory with a
spare trans,60% of my shops work was those transaxles

Mar 30, 2014 | 2006 Dodge Grand Caravan

1 Answer

I have a 1998 jeep grand cherokee Laredo limited 5.9. I am trying to get the tow package electrical to work, but it doesn't seam to get any power to the plug in at the trailer hitch. I have checked


sure, why not look that up in the FSM.?
why not say which function fails.
park, turns, brake? backup (all 4?) (check ground #5)
after market wire job or factory tow package?
we cant guess any of that.

you can see all the orig. wiring here.
ZJ, click that and 8w wiring chapter.
and see it all, every inch of wire in car."STOCK"
stock means, as it left the factory Day 1.

I looked and didnt see a tow option in the FSM. 1998.
but didnt read every page.

Feb 16, 2014 | Jeep Cars & Trucks

1 Answer

Tow package electrical problem


blown fuse.
or the kit was not fully installed or someone pulled relays in the kit.
is stock.
alldata.com has the wiring paths , for sure.
if not stock , anything is POSSIBLE.

Feb 15, 2014 | 1998 Jeep Grand Cherokee

2 Answers

Why its leaking transmission fluid from bottom of radiator


The trani fluid runs through the radiator to cool it. Sounds like one of your Trani lines is leaking at the radiator connection

Dec 19, 2012 | 1996 Jeep Grand Cherokee

1 Answer

Is there a transmission cooler on the '96?


All with automatic transmissions have a cooler inside the radiator. If you have a tow package you should also have an additional one installed on the front of the a/c condenser.

Dec 12, 2010 | 1996 Jeep Grand Cherokee

1 Answer

What is pulling capacity of 93 jeep grand cherokee


Towing capacity depends upon trailer design and actual tongue weight of the trailer and load. It also depends upon the condition of your rear suspension, engine size, the condition of your cooling system and if you have an add-on transmission cooler. (for automatics). Last, capacity is also determined by the hitch rating. Generally speaking, you should be able to pull around 5,000 lbs without problems.
If towing long distances or up steep grades it is wise to change the transmission and differential fluid before towing and service those more frequently than normal.

Dec 03, 2010 | 1993 Jeep Grand Cherokee

1 Answer

I have a 2005 Dodge Grand Caravan 3.8 L eng with an automatic transmission. I noticed that sometimes the transmission will disengage. I put it back in park then drive and it goes as normal. Today I found...


Most automatic transmissions will have a cooler that is in the radiator. Some will also have an external cooler (really common on vehicles with a towing package). It is really common for the cooler hoses to leak on the caravans. Make sure you are using ATF+4 for trans fluid. No other transmission fluid should be used in a chrysler!

Sep 25, 2010 | 2005 Dodge Grand Caravan

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