Mechanics

I HAVE A CHEVY AND THE HEADLIGHTS AND RADIO STOPPED WORKING AT THE SAME TIME. WE HAVE CHECKED ALL FUSES AND THEY ARE OK. ALSO THERE IS AN UNKNOWN DRAIN ON THE BATTERY AND IF WE DONT UNHOOK THE BATTERY CABLE THE TRUCK WILL BE DEAD BY MORNING

1980 Chevrolet Blazer • 15,600 miles

We have checked all fuses and have changed battery and alternator
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Barbi_kersey
December 12, 2011.



Check for voltage to and from the headlamp switch. Got to start somewhere. Did you check for voltage to the applicable fuses? Use a voltage tester.


JDL
Dec 12, 2011.
My wiring for your model year isn't the best, as far as headlamps. Click on the link.

As far as a battery drain. You pull/replace fuses one at a time till the drain goes away. When you pull the fuse on the problem circuit, the drain goes away.
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JDL
Dec 12, 2011.

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