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I have no low beam headlights on my 2012 2500 Silverado.

Customer Question
That said I replaced the...
I have no low beam headlights on my 2012 2500 Silverado. That said I replaced the lamps. Still no lights fuse looks ok. Thus is there a relay on the lights? What should I check?
Submitted: 8 months ago.Category: Chevy
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Answered in 39 minutes by:
9/11/2017
Chevy Mechanic: Gunvir Singh,
 replied 8 months ago
Gunvir Singh
Category: Chevy
Satisfied Customers: 2,013
Experience: Master Tech at Kennesaw Auto Tech
Verified

HEllo, let me review your request. Please standby.

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Customer reply replied 8 months ago
See it how would I test that relay.
Customer reply replied 8 months ago
No thanks on the phone call just send written directions. I'm in a continuing education class tonight so won't test till morning
Chevy Mechanic: Gunvir Singh,
 replied 8 months ago

A relay tester will be needed to test it but it will be easier to swap it with a similar relay.

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Customer reply replied 8 months ago
Ok I'll pick up a new one and see if that solves the problem
Chevy Mechanic: Gunvir Singh,
 replied 8 months ago

Do you not have a similar relay on the fuse box to swap for test?

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Chevy Mechanic: Gunvir Singh,
 replied 8 months ago

Please read this:

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Customer reply replied 8 months ago
I changed the relay low beam lights still do not work!
Chevy Mechanic: Gunvir Singh,
 replied 8 months ago

I am offline for the day. I will let another expert assist you.

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Chevy Mechanic: Mike S., Chevy Mechanic replied 8 months ago
Mike S.
Mike S., Chevy Mechanic
Category: Chevy
Satisfied Customers: 8,016
Experience: ASE Certified Master Technician
Verified

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.

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Chevy Mechanic: Mike S., Chevy Mechanic replied 8 months ago

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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Chevy Mechanic: Mike S., Chevy Mechanic replied 8 months ago

Did that answer your question? If so, kindly leave me a positive rating, so I get credit. After all, you have already made the deposit.
If you don't, the deposit you made will just sit there and I won't get my share of it.

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Customer reply replied 8 months ago
I've tried your suggestions and still no low beam head lights. Changed dimmer switch and head light control switch along with relay at this point. All fuses are good and lamps are new as well what next.
Customer reply replied 8 months ago
I have no engin lights on or faults.
Chevy Mechanic: Mike S., Chevy Mechanic replied 8 months ago

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.

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Customer reply replied 8 months ago
Without the truck running I'm getting 8 volts at the fuse.
Chevy Mechanic: Mike S., Chevy Mechanic replied 8 months ago

Which fuse and why is it only 8 volts? What is the voltage at the battery?

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Chevy Mechanic: Mike S., Chevy Mechanic replied 8 months ago

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?

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