Question about 1994 Jeep Grand Cherokee

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Blowing engine control fuse on 94 grand cherokee

Have same problem, engine control fuse keeps blowing. it may go a week or a day, dont know when it will blow

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You might have a wire from the engine control circuit that has rubbed through on the engine block somewhere. Do a visual inspection of the engine wiring, and look closely for any damaged insulation. I have seen a problem like this before. Good Luck!

Posted on Sep 28, 2009

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94 Jeep Grand Cherokee 4x4 with the 4.0 Keeps blowing the fuse that controls the fuse box inside the jeep, its blowing a 40 amp fuse. I believe there is a short. but i don't where to look.


Get yourself a set of factory wiring diagrams,
otherwise your wasting your time

You have no idea what you working on, without
reference material

Helm.Com

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We just put new gaskets on our 94 jeep grand cherokee laredo was runing great now something keeps blowing the eng control fuse help!!!


first place I'd look is around the perimeter of the heads (I assume you mean head gaskets?) Make sure you haven't inadvertently gotten a wire pinched in between the head & block somewhere.

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use a circuit breaker or paper clip with pliers so you do not burn yourself use paper clip as fuse unplug engine controll sensors 1 at a time and check if problem is gone after each one is unplugged an engine controll sensor is most likely shorting out if you have a map sensor try that first then move on to other components tps,fuel pump ect. till you find wich is fauly causeing short this should help you just be carefull with paperclip am saying to do this instead of blowing expensive fuses

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Pretty sure I have answered this about a million times. Blower motor is on engine side of firewall on passenger side. You can run a hot lead to it to check if it's working! You did check fuse... Right?

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1994 is the same as 1997. parts are interchangeable

Dec 31, 2008 | 1994 Jeep Grand Cherokee

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no it wont work.they made too many changes with them about 2 years older and id say yes but no they wont interchange

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2 Answers

96 jeep grand cherokee


If it is the fuse for major engine control electronics that is blowing (PCM, etc.) as soon after energizing, try disconnecting the O2 sensors. The 12V heater in the sensor could be shorting to ground.

Nov 17, 2008 | 1996 Jeep Grand Cherokee

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