Headlights don't work! Help! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

whatleyr · 08-09-2020, 03:14 PM

IT NEVER FAILS! Take you classic truck to get inspected and the lights don't work.

All of my lights inside and out of my 65 c10 work just fine except the headlights. The lights will not come on when you pull the switch. I thought the bulbs were bad but when I push the dimmer in the floorboard, they come on. SO low beams are not working. I'm not an electrician so please help me trouble shoot this so I can get this thing inspected. Thanks in advance.

bigmoe · 08-09-2020, 05:00 PM

Must be the dimmer switch.

whatleyr · 08-09-2020, 10:14 PM

How can I test it before confirming it is indeed the dimmer switch? Thanks

bigmoe · 08-09-2020, 10:45 PM

Pull the dimmer switch and test it. Although they are pretty cheap to buy if you just replace it and try.

SCOTI · 08-13-2020, 05:30 PM

Quote:

Originally Posted by bigmoe

Pull the dimmer switch and test it. Although they are pretty cheap to buy if you just replace it and try.

To add to the suggestion.... Testing can simply be pulling/disconnecting the dimmer switch out of line & jumper the connections to see if the headlights come on.

**slepysal** · 08-14-2020, 12:49 AM

check the fire wall plug

plmadding · 08-10-2020, 04:12 PM

Just noticed my 66 C20 is doing the exact same thing. Dimmer switch seems like the most likely culprit.

08-09-2020, 03:14 PM	#1
whatleyr Registered User Join Date: Mar 2015 Location: Lone Star, TX Posts: 26	Headlights don't work! Help! IT NEVER FAILS! Take you classic truck to get inspected and the lights don't work. All of my lights inside and out of my 65 c10 work just fine except the headlights. The lights will not come on when you pull the switch. I thought the bulbs were bad but when I push the dimmer in the floorboard, they come on. SO low beams are not working. I'm not an electrician so please help me trouble shoot this so I can get this thing inspected. Thanks in advance.

08-09-2020, 05:00 PM	#2
bigmoe Registered User Join Date: Oct 2014 Location: Brandon, Manitoba, Canada Posts: 995	Re: Headlights don't work! Help! Must be the dimmer switch.

08-09-2020, 10:14 PM	#3
whatleyr Registered User Join Date: Mar 2015 Location: Lone Star, TX Posts: 26	Re: Headlights don't work! Help! How can I test it before confirming it is indeed the dimmer switch? Thanks

08-09-2020, 10:45 PM	#4
bigmoe Registered User Join Date: Oct 2014 Location: Brandon, Manitoba, Canada Posts: 995	Re: Headlights don't work! Help! Pull the dimmer switch and test it. Although they are pretty cheap to buy if you just replace it and try.

08-14-2020, 12:49 AM	#6
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	Re: Headlights don't work! Help! check the fire wall plug __________________ 1960 Apache long bed fleet L6 250 Clifford intake 2 bbl carb. Langdon cast headers with dual exhaust and bellflower tips. T-5 5 speed, power steering and power disc brakes. "Over, Around or through it... "

08-10-2020, 04:12 PM	#7
plmadding Registered User Join Date: Apr 2018 Location: Kansas Posts: 54	Re: Headlights don't work! Help! Just noticed my 66 C20 is doing the exact same thing. Dimmer switch seems like the most likely culprit.



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