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

Jun 20, 2012 | 1994 Jeep Grand Cherokee

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I have a 1994 jeep cherokee with the 4.0l engine and it keeps blowing the 30 amp Engine Control 1 fuse in the fuse box on the passenger side inner-fender of the engine compartment. Every time i hit the...


Check your exhaust many times it'll be a o2 sensor wire touching the manifold causing the short to ground. Start there let us know. Hope this helps.

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1 Answer

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.

Sep 18, 2009 | 1994 Jeep Grand Cherokee

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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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