Question about 2008 Chevrolet Malibu
Replaced bad factory amp now it powers on for minutes at a time and then blows the fuse
Use amp meter and determine power draw against fuse size. Something is shorting - but if you can determine how much power is trying to go through you can devise a fix.
Posted on Nov 09, 2019
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Posted on Jan 02, 2017
It sounds like a bad ignition switch or something is grounding out.Try to isolate the problem to key positions.See if the fuse blows when you turn the key to ACC(when your dash lights come on without starting)If the fuse does not blow then when you go to start it and it blows it could be one of many problems,the more common ones could be ignition switch,wiring,starter relay,starter soleniod,or perhaps the starter itself is shorting out,this can sometimes happen when a starter goes bad.
Posted on Apr 12, 2009
A fuse that is consistently blowing is telling you that there is a short in that system. Don't attempt to bridge it or use a larger amp fuse or you will have a major problem. You will need to start tracing wiring to destinations to find the short. If while moving harnesses around problem ceases to exist, look at nearby items where you are working and try to locate what was grounding. Sometimes people will stop if short disappears, leaving open the possibility of it happening again.
If you are not comfortable working with wiring, then leave it to professionals who do this every day. It's not really difficult but requires patience and a good bit of knowledge to do this right!
Posted on Apr 18, 2009
SOURCE: fuse keeps blowing
If fuse keeps blowing that means that there is a shortage on AC wiring or switch controlling the air conditioner.
Also an abnormal power draw from AC caused by an internal fault on AC can cause the fuse to blow.
Test wiring and switch with a voltmeter, the most common is that there is a short to ground between wiring and car body somewere.
Posted on Apr 29, 2009
the fuel pump and radio are not on the same circuit, most liokely the fuel pump is shorted, that is the most common cause, get under the truck and disconnect the fuel pump connector at the tank, if the fuse doesn't blow then u need a new pump.
Posted on Dec 05, 2009
I would trace the wire from the horn and see if it was inadvertently damaged when the alternator was installed. If you have a voltmeter, you can remove the horn fuse and check to see if there is continuity between the horn (non hot side) of the fuse and the car body. This would indicate a short in the wire running from the fuse box to the horn. You can also look around the alternator mounting area to see if any wires are being pinched. Hope this helps. Good luck!
Posted on Mar 10, 2010
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