1968 C10 headlights flash with engine on or off - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1968C10LWB · 06-01-2018, 10:45 PM

I have read the previous post regarding this same issue and have checked the grounds and replaced the dimmer switch. There are no sounds when the lights start flashing and it will happen with the engine on or off. i just picked up this truck about 6 weeks ago so I don't know the history of what has been done.

Any ideas to help me troubleshoot?

Thanks

**Stocker** · 06-01-2018, 11:14 PM

Welcome aboard!

Is it just a random on-off-on-off, with no regular pattern? Does it happen only when the light switch is on? Without more info, I'd guess a bad headlight switch. You might have to remove the switch to access it to test it with a test light or basic VOM. It might also be a loose-fitting connector on the headlight switch.

1968C10LWB · 06-02-2018, 12:15 AM

It is when the switch is on. I haven't checked the headlight switch itself. Good call, I will let you know

**Grumpy old man** · 06-02-2018, 05:48 AM

Fords were famous for this problem in the 70's , Stockers right head towards the light.... (switch)

phat69 · 06-02-2018, 08:19 AM

unplug the switch and see if it stops.

1968C10LWB · 06-14-2018, 12:51 AM

It was the switch...thanks for the help!

David

**Stocker** · 06-14-2018, 12:59 AM

Glad you found it, and thanks for the follow-up!

06-01-2018, 10:45 PM	#1
1968C10LWB Registered User Join Date: Apr 2018 Location: Windsor, CO Posts: 4	1968 C10 headlights flash with engine on or off I have read the previous post regarding this same issue and have checked the grounds and replaced the dimmer switch. There are no sounds when the lights start flashing and it will happen with the engine on or off. i just picked up this truck about 6 weeks ago so I don't know the history of what has been done. Any ideas to help me troubleshoot? Thanks

06-01-2018, 11:14 PM	#2
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,692	Re: 1968 C10 headlights flash with engine on or off Welcome aboard! Is it just a random on-off-on-off, with no regular pattern? Does it happen only when the light switch is on? Without more info, I'd guess a bad headlight switch. You might have to remove the switch to access it to test it with a test light or basic VOM. It might also be a loose-fitting connector on the headlight switch. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

06-02-2018, 12:15 AM	#3
1968C10LWB Registered User Join Date: Apr 2018 Location: Windsor, CO Posts: 4	Re: 1968 C10 headlights flash with engine on or off It is when the switch is on. I haven't checked the headlight switch itself. Good call, I will let you know

06-02-2018, 05:48 AM	#4
Grumpy old man Senior Member Join Date: Dec 2013 Location: Gods country East,Tn Posts: 8,545	Re: 1968 C10 headlights flash with engine on or off Fords were famous for this problem in the 70's , Stockers right head towards the light.... (switch)

06-02-2018, 08:19 AM	#5
phat69 Registered User Join Date: Mar 2018 Location: Texas Posts: 51	Re: 1968 C10 headlights flash with engine on or off unplug the switch and see if it stops.

06-14-2018, 12:51 AM	#6
1968C10LWB Registered User Join Date: Apr 2018 Location: Windsor, CO Posts: 4	Re: 1968 C10 headlights flash with engine on or off It was the switch...thanks for the help! David

06-14-2018, 12:59 AM	#7
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,692	Re: 1968 C10 headlights flash with engine on or off Glad you found it, and thanks for the follow-up! __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.