Question about 1996 Jeep Grand Cherokee

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1996 Jeep Grand Cherokee...Blowing ASD fuse

My jeep keeps blowin the auto-shutdown fuse which causes it to either stall or not start! When the fuse blows the fuel pump keeps running but none of the gauges work and it wont start...Any Ideas?

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My daughters jeep had the same problem. We fixed by finding the wires that run beside the manifold down under the car. The conduit that have the wires in it was worn away because of resting up against the manifold, causing the wires to short the system out. Once I replaced the conduit and taped the wires it has not shorted out again. By the way, the Jeep dealer couldn't find the problem.

Posted on Feb 24, 2009

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Just a guess but you likely have a short somewhere...start tracing the circut till you find a ground that shouldn't be there. Find out how many smaller fuses that circut serves and try to isolate it down from there!

Posted on Feb 22, 2009

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What about your fuel rail regulator, which is in the tank with the fuel pump on some cars? Does it have a pressure switch/sensor that isn't telling the engine control module to shut the pump off when the rail pressure is obtained? If you turn the vehicle to on (not start) and the pump runs more than a couple seconds, like until the fuse blows, it could be either a stuck pump relay or worse, the fuel pump control signal. Pull the pump relay, add a new fuse and see if the pump runs with the key in the on position again, which it shouldn't. If it doesn't run, the issue is either the relay, or the control signal to the relay that is keeping the pump on all the time, causing the fuse to blow.

It sounds to me like the pressure is going to high and stalling or slowing the pump causing excessive current from the motor and blowing the fuse. If that's the case your old pump might not have been the problem. How's the fuel filter? That's in line with the fuel line to the fuel rail?

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