Question about 2002 Jeep Liberty

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Blowing 30 amp asd fuse

After running 20 sec it blows the 30 amp asd fuse

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Posted on Jan 02, 2017

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SOURCE: 98 grand cherokee asd relay blowing fuse

The fuse it doing it's job, you have a short ( Wire that is connected to a ground, that draws too much power )

If you have an electrical schematic ( Repair manual ) find out which wires are connected to that fuse and check them for any chaffing, cuts, unnesassary twists, or corrosion.

If you have a ohm-meter, isolate the system ( by disconnecting the fuse, and other connections. Then check for any resistance on wires that should not be connected ( because you disconnected them ) by having one Lead on the wire's connector and the other meter-lead on your car's frame. A good wire will not have continuity if it is isolated.

Posted on Apr 10, 2010

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1 Answer

The 25 amp ASD fuse keeps blowing when i try to start myTown & ountry 2001


In that case you have a dead short somewhere. This suggests replacing the ASD relay, and there is a neat trick using a bulb instead of a fuse to track the problem.

https://www.2carpros.com/questions/2001-dodge-caravan-asd-fuse

And 'Chrysler Tech' here has good advice as to what is causing it.
http://www.chryslerforum.com/forum/chrysler-pacifica-15/asd-fuse-blowing-right-away-help-23819/

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You may need a shop manual to get the wiring diagrams to troubleshoot this.
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98 grand cherokee asd relay blowing fuse


The fuse it doing it's job, you have a short ( Wire that is connected to a ground, that draws too much power )

If you have an electrical schematic ( Repair manual ) find out which wires are connected to that fuse and check them for any chaffing, cuts, unnesassary twists, or corrosion.

If you have a ohm-meter, isolate the system ( by disconnecting the fuse, and other connections. Then check for any resistance on wires that should not be connected ( because you disconnected them ) by having one Lead on the wire's connector and the other meter-lead on your car's frame. A good wire will not have continuity if it is isolated.

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It looks like the wire circuit for the wiper motor is touching the car body when shaken so the only thing you can do is shake the wires and terminals yourself while engine is running then maybe you can pinpoint where the earthing is.

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hmm. lt look like there are poor joints in your wiring specially the groung wire. check the diagram of your auto. check the unit diagram for which the fuse blows. usually the fuse blow when there is a short circuit. if you look around you will find it.
good luck
ehsan.

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1 Answer

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It appears that it is part of the fuel pump circuit, so I would concentrate on wiring harness & connector at fuel pump, clean it real good, and apply dielectric grease to the connection, as well as the fuel pump relay, connector & harness.

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