Electrical Problem????
My car is a 99 Firebird. Had a aftermarket radio in there and took it out from reading a post on this forum saying that the radio could cause the headlight switch to fail. So I replaced the headlight switch to no avail. Still didn't fix the problem. So my question is what step should I do next. I have the whole front off the dash and the radio out. And I replaced the battery not to long ago with a red top.
Any help would be nice. Just let me know what you guys think.
I have heard of the DRL Module causing problems with this as well can anyone confirm.
If your hazzards, tail lamps, and gauges don't work, you have a failure in multiple circuits.
You should probably start by testing the voltage at the fuses. Measure across the fuse and then from the supply to ground to see what you have.
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You want to test it this way, otherwise it could destroy your meter.
You'll need to have the circuit you are testing on. If you don't get anything, try testing from each post to a ground like the body. If you get voltage to a separate ground but not at the fuse, then that will point to an issue after the fuse box. If you get no voltage either way, then you've got a supply problem to the fuse box.
So what's the next step? Pulling out the fuse box its self and looking at wires and all that jazz?
A better way to test them would be to put a ground on the body and then test each terminal in the fuse head for positive current. If only one of the sides of the fuse is hot, its a bad fuse. If neither side of the fuse is hot - its time to start rummaging in behind the fuse box or in the engine compartment.


