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Donna Armiger Posted on Apr 13, 2019
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Engine fire in 2000 jeep grand cherokee laredo could it have been caused by putting in new radiator fan control relay circuit ?

1 Answer

Larry Ng

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  • Jeep Master 14,598 Answers
  • Posted on Jul 24, 2023
Larry Ng
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Joined: Apr 07, 2013
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That is a gas fire(well at the end point sure)
top causes is others bypassing fuses or using wrong fuse. burning up the harness. and propagated to fuel lines
or injector swaps or fiddled with and not using new o-rings
or worse fake 0-rings, not VITON or rated by jeep as safe.
same goes for any fuel lines there, damage or connections damaged.
no country told ,why. recalls can be based by COUNTRY. and by ENGINE for sure
and no engine told and was and engine fuel fire,that nasty. to me.
there was fuel tank pipe weld failure recall on 1000 cars made
not engine side,no other fuel word found search TSB data base me USA

5 Related Answers

Anonymous

  • 2 Answers
  • Posted on Oct 28, 2008

SOURCE: i got a 99 jeep

It's behind the passenger headlight.Need to take off grill,bumper fascia to get access to it.Mine took about an hour alltogether.

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Anonymous

  • 57 Answers
  • Posted on Jun 14, 2009

SOURCE: 1999 jeep grand cherokee laredo 4.0 litre

OK here we go you will need a test light for the following tests, i will try to be as descriptive as possible so lets get started

fist start the engine and turn on the a/c that should command the fan on.
right front engine compartment next to the battery is the power distribution center pop off the top, ground your test light to the negative battery terminal and find fuse number 10 it is a 40 amp fuse check both sides of this fuse with your test light, if you have power on both sides of the fuse than we shall go further.

unplug the connector from the cooling fan, there should be two wires in the plug one is dark green and the other is black with a pink tracer, with your test lite grounded to the negative battery terminal check the dark green wire for power, if there is power there than move your test light ground clamp to the battery positive terminal and test the black wire for ground,
if testing the black wire made the test light shine than the ground circuit is good, if it did not than check you ground connection behind the right headlight.
when testing the dark green wire, if the dark green wire made the test light shine and the ground circuit is good than you simply have a bad coolant fan motor.

I suspect you were not getting power to the fan motor so you will need to take a look at the radiator fan relay, this is a special solid state relay mounted to the inside of radiator core support on the right side down behind the bumper.

here you will find a single plug with 4 wires in it

black = ground
dark blue / pink = relay controll from pcm
dark green = output to radiator cooling fan
gray = battery power from fuse # 10 in pdc

unplug the relay ground your test light to the battery negative terminal, with the engine running and a/c turned on check the gray wire the test light, it should turn on if not recheck fuses.

move your test light to the battery posistive terminal and test the dark blue / pink wire, if the test light turns on than you have a bad radiator fan relay, you can pick one up at your local parts store for about $85.00 just make sure you get a high quality one the cheap ones have a hard time with the amprege consumption of that fan.

good luck

wesley [email protected]

ZJLimited

ZJ Limited

  • 17989 Answers
  • Posted on Nov 04, 2009

SOURCE: location for radiator fan control relay circuit

This relay is a common problem for Chrysler vehicles. Located in the passenger side bumper area (Jeeps). Test the fan first.

Hope helped (remember rated ths help) Good luck.

Anonymous

  • 1 Answer
  • Posted on Feb 16, 2010

SOURCE: 1996 JEEP GRAND CHEROKEE LAREDO Illumination

jeep will not starting

Anonymous

  • 2317 Answers
  • Posted on Jun 03, 2010

SOURCE: What will cause a Clacking/Clicking noise coming

It maybe a loose heatsheild on the manifold, converter, or underbody heatsheild.

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Related Questions:

0helpful
1answer

FAN

The computer gets a signal from the engine temp sensor that the fan is needed, and grounds the fan relay to provide power to the fan.
0helpful
1answer

My 2002 jeep grand cherokee laredo wull not start shutdown 2 days ago checked all fuses but the ecu fuses don't know how to find them

According with your other quesions, the DTC P1491 code is actually radiator fan control relay circuit.
Soft reset if the battery disconnect would have erased the code; the first thing I would replace for that code (fan relay).
Additionally, its possible thta your THEFT system is activated, check owners manual to disarm. Check details here:
- Grand Cherokee fuses

- Diagnostic Trouble Codes

Hope this helps.
2helpful
2answers

P1491 diagnostics code for 2003 Jeep Grand Cherokee


Trouble Code: P1491 You PCM does not sense current to radiator fan when it turns it on. Is the fan coming on or not? Usually not when you have this code. Problem can be with the fuse, relay, wiring or fan itself. First check the fuse. If good, next try swapping the relay with another one in the engine compartment relay box, such as the horn relay.
Let the car warm up and see if the fan will come on. If yes, get a new relay. If not, either use a test light to see if there is voltage at the fan connector when the engine is on and hot, or else test the fan motor by hotwiring it to the battery. If none of this works, please get back to me for how to troubleshoot the wiring.


Radiator Fan Control Relay Circuit Malfunction
Possible Causes:


Radiator fan control relay circuit is open or shorted to ground Radiator fan control relay circuit is open (test power to IGN) Radiator fan control relay is damaged or has failed PCM has failed

0helpful
1answer

Coolant sensor keeps saying bad would that cause it to over heat jeep laredo 97 grand cherokee

Yes, cause that sensor operates the electric cooling fans by the radiator, if those fans or fan don't come on, the radiator can't cool down as quick and causes the engine to run hotter.
7helpful
3answers

My 2000 Jeep Grand Cherokee overheats in traffic

Check the fuse for the fan and use a test light to make sure that the circuit is functioning. Warm up your car then feel along the top and bottom of the radiator to check for cold spots. If you find any then you may need to replace your radiator. If your heater isn't currently working it may be that since it is a part of your cooling system.
0helpful
1answer

I have jeep gran cherokee laredo 2000 engine 4 liters my engine fan no work a i check direct my fan and work i chech the fuses is ok and relays to

Check your temperature sending unit. Here's how it works: sending unit sends a message to the computer telling it it's hot. Computer sends a ground signal to the relay that in turn completes the circuit to the fan. If the temp sender does not do that and the computer, fuse, relay and wiring are good, the fan won't come on.
1helpful
2answers

I have replaced the radiator on my 2000 Grand Cherokee and now the on board computer reads" open circuit"in the place where the temperature should be displayed. please assist.

Either your temperature sensor is unplugged or it has failed and is giving you that reading. (most likely cause...if not, start checking wiring from the sender and make sure any electric cooling fans are plugged in as well.
3helpful
1answer

Location for radiator fan control relay circuit for 1999 Grand Cherokke Laredo.

This relay is a common problem for Chrysler vehicles. Located in the passenger side bumper area (Jeeps). Test the fan first.

Hope helped (remember rated ths help) Good luck.
0helpful
1answer
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