Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
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Attached is the underhood fusebox index and headlamp relay is marked in red.
A relay tester will be needed to test it but it will be easier to swap it with a similar relay.
Do you not have a similar relay on the fuse box to swap for test?
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Check if you have voltage at both of the low beam fuses with the headlights on low beam. that would be #12 and #16 in the underhood fuse block.
here is that Headlights Circuit .
If there is no voltage at those fuses, try temporarily jumping the pink/white wire from the low beam relay to ground and see if it works now.
If so, hook the wire back up and this time ground the yellow wire from the bcm to the dimmer switch to ground and check again if the low beams now work.
If so the dimmer switch is most likely bad. If it still don't work but it did work when jumping to ground that pink/white wire then the problem is with the bcm.
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I don't see where you tried any of my suggestions!
It appears you just looked at the fuses to see if they were blown or not. That was not the point behind checking them for voltage.
I didn't see you mention that you jumped any wires like I asked, instead you just replaced the dimmer switch before doing any of the tests I asked.
I never mentioned changing the headlight control switch.
Which fuse and why is it only 8 volts? What is the voltage at the battery?
I mentioned 2 fuses, the #12 and #16 in the underhood fuse block, so which fuse, why didn't you also test the other fuse and why is it only 8 volts? Is the battery dead?