1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Blowing fuses

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Old Feb 10, 2008 | 12:16 PM
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Blowing fuses

Car keeps blowing the fuse for the headlight motors and the instrument gauges withing 5 mins of starting car. ???
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Old Feb 10, 2008 | 02:09 PM
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sounds like a short in the system. Time to trace your wires and find the broken one.
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Old Feb 10, 2008 | 02:10 PM
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Originally Posted by orion84gsl
sounds like a short in the system. Time to trace your wires and find the broken one.
I agree, it might be hard to find, but there most likely is a short.
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Old Feb 10, 2008 | 03:41 PM
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would they be seperate wires that are broken? why would it be those two items? are they linked together anywhere?
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Old Feb 10, 2008 | 04:00 PM
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Take a look at the wiring diagrams in the FSM, almost 100% being a short. All the wires come together into the main harness at some point so yea they are linked together somewhere.
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Old Feb 12, 2008 | 10:14 PM
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no broken wires or even bare wires. nothing seems out of place. but now the blower motor doesn't work and the tail lights don't work either.any suggs?
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Old Feb 12, 2008 | 10:52 PM
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Something is shorting out. Sounds like it's rooted in the lighting system so I would start there. Also check your primary battery cables make sure the ground is proper. What's the alternator reading? Normal output for voltage?
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Old Feb 13, 2008 | 11:55 AM
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alternator is reading at a normal level
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Old Feb 13, 2008 | 01:23 PM
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On my '80 the tailights are on the same fuse as the retractor motor for the headlights. It is a 10 amp fuse, try replacing it with a 15 amp fuse.
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Old Feb 14, 2008 | 08:24 AM
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never use i higher rating fuse than whats called for. there is a reason for the amp rating. if it pops a fuse then you have a problem.
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Old Feb 14, 2008 | 09:14 AM
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When I changed my instrument cluster a similar thing happened my headlight retractor would not work and the fuse blew. If your wiring checks out it may be a problem in the instrument cluster. If you can get your hands on a spare cluster try temp installing another one and see if it fixes the problem. The circuitry card in the back of the cluster is almost unrepairable so i wouldn't bother trying to fix the old one. Also check your combination switch for broken or loose contacts
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