Chrysler Repair/Dead Short


Hello Roland,

Thank you for your assistance in advance.  I have a 1991 Chrysler Fifth ave, 3.3 with a short.  The number 12 fuse blows instanly.  This circuit controls  the body computer, electronic cluster(which there really isnt one, its all analog), Radio circuit, glove  box lamp and interior lights as well as cigi lighter.  

I have pretty much disconnected everything and put in new fuse and it still blows.  Was hoping you might have some suggestions as this seems like looking for a needle in a hay stack.  

I also just replaced the heater core.  After two days the short started to occur.  Thought maybe I pinched a wire, but dont see any issues there.

Any suggestions would be greatly appreciated.


I answered your question on Monday, and again on Tuesday. Check your in-box or look at the home page of Chrysler repair to see my answer there.
Here it is again:
Hi Chris,
That fuse 12 is the 'ignition off draw fuse' which powers everything needed when the engine is shut down: interior lights, cigar lighters (there are two), memory of the cluster/radio, glove box, under hood and trunk lamps, vanity mirror lamps, black plug of the body control module (pin 16).
The most likely would be a coin that has fallen into one of the cigar lighter sockets or one of the many bulbs has a short in its socket or the bulb itself. It may be that you would have to remove all the ignition-off bulbs and then start putting them back in until the fuse blows. There is no each way that I can see to separate all those different items without getting into some splices. So think back on any bulbs that may have stopped working as a possible location of a bad bulb/socket.
Please read the PS below and respond to it.

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Roland Finston


Free fast answer to your repair question about a Chrysler/Dodge/Plymouth car, minivan, SUV, or truck. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty. This free troubleshoot advice forum helps you diagnose faults, minimize repair costs or do-it-yourself.

I answer questions seven days a week and respond to you in about 30 minutes. "Maxed Out" means I am answering another question, briefly unavailable, or asleep overnight, so try again later.

I have do-it-yourself experience (50+ years) and a library of 100 1982-2011 Chrysler factory shop manuals and 20 multi-manual Chrysler Corp. CD's.

I was voted "Top Expert" 2010-2015, here at AllExperts, and have answered 20,000+ questions.


Five decades as a 'do-it-yourselfer' on domestic and imported cars.

Yahoo Autos Group called The Chrysler Lebaron Club (co-moderator)

Advanced degrees in Physics/bruised knuckles

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"Top expert" of 2010, 2011, 2012, 2013, 2014 and 2015 here at Allexperts. Quickest "average response time" at Allexperts (currently no. 1).

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