![]() |
|
![]() |
#1 |
like a rock
![]() Join Date: Nov 2004
Location: Ontario, Canada
Posts: 517
|
Headlight Issue
I'm having an issue with my headlights flashing off and on when I turn the highbeams on via the floor switch in my 1981 shortbox. Headlights are normal without the use of highbeams, they dont start to flash off and on until the dimmer switch is used to turn the highbeams on. The two blue lights on the cluster also flash with the headlights. The dimmer switch is brand new and is not the problem. Tried switching negative battery cables and alternators and no change. Battery is also new. Any suggestions would be greatly appreciated.
|
![]() |
![]() |
![]() |
#2 |
Registered User
Join Date: Nov 2009
Location: Sherman, ME
Posts: 2,359
|
Re: Headlight Issue
Hi Vern,
The headlight switches in these trucks (and many other GM vehicles) have a built-in auto-resetting circuit breaker. If you're running aftermarket "high output" headlights that draw more current than stock, that could be overloading the switch and kicking out that internal circuit breaker. Since it's auto-resetting, that'll make the lights flash like you're seeing happen. But if you're running stock type headlights, it could be that the circuit breaker in the headlight switch is just getting weak and kicking out under the increased current of the high beams vs. the lows. Last edited by ray_mcavoy; 04-12-2011 at 07:41 PM. |
![]() |
![]() |
![]() |
#3 |
like a rock
![]() Join Date: Nov 2004
Location: Ontario, Canada
Posts: 517
|
Re: Headlight Issue
Thanks, I'll give it a shot.
Posted via Mobile Device |
![]() |
![]() |
![]() |
#4 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
|
Re: Headlight Issue
Agree on the circuit breaker being the issue. New switches are dirt cheap.
It would also be a good time to do headlight relays to reduce the current flowing through the switch.
__________________
I'm on the Instagram- @Gearhead_Kevin |
![]() |
![]() |
![]() |
#5 |
like a rock
![]() Join Date: Nov 2004
Location: Ontario, Canada
Posts: 517
|
Re: Headlight Issue
Where abouts are the headlight relays? Swtich fixed it, I had a spare kicking around. Thanks ray_mcavoy
|
![]() |
![]() |
![]() |
#6 |
Registered User
Join Date: Apr 2011
Location: portland, or
Posts: 2
|
Re: Headlight Issue
Thanks for posting this. I'm having a similar issue with an 80 LUV. My headlights blink intermittently, somewhat more often while in high beam mode. I've replaced headlamps, high/low/turn-signal unit, turn flasher, hazard flasher, cleaned the battery ground at the frame, cleaned the fuse box terminals, and cleaned many other connectors.
Are your referring to the light switch, as in the on/off push/pull knob? I've swapped that too; however, it's used but was in better condition. I'm not really sure if there's a circuit breaker for the headlight switch, or headlight relays. i'll return to the haynes manual. this post has already given me something to research though. Thanks. Extra thanks, because I realize the LUV is really and Isuzu. I have owned 68, 73, 80 chevy trucks and an 86 Suburban. Cheers. |
![]() |
![]() |
![]() |
#7 |
like a rock
![]() Join Date: Nov 2004
Location: Ontario, Canada
Posts: 517
|
Re: Headlight Issue
I replaced the headlight pull out switch, fixed my problem.
Posted via Mobile Device |
![]() |
![]() |
![]() |
#8 |
Registered User
Join Date: Apr 2011
Location: portland, or
Posts: 2
|
Re: Headlight Issue
cool, thanks. tonight, i noticed the switch is getting hot when the lights blink, so i'll bet it's corroded or worn.
|
![]() |
![]() |
![]() |
#9 |
Registered User
Join Date: Dec 2010
Location: Pittsburgh, PA
Posts: 1,009
|
Re: Headlight Issue
If the switch heats up, it's toast. It happened to me once and I burnt myself pretty nicely. Replaced the switch and it fixed everything.
__________________
Steve Member of the Foot Pedal Club '83 Chevy K20: 6" Rough Country, 3" Performance Accessories BL, Bushwacker Cutouts, 38x15.50 Mickey Thompson Baja Claws, 350 HP 350 crate engine from Jegs, Turbo 400 ![]() |
![]() |
![]() |
![]() |
#10 |
Registered User
Join Date: Mar 2011
Location: Vancouver, Canada
Posts: 107
|
Re: Headlight Issue
I was having issues with my high beams as well, i wired them to a rocker switch i placed on the cluster and ran it to a relay then all new wire to the hi beams and no more issues.
__________________
1984 3/4 Ton Reg cab Longbox 4x4, Carbed 350/Turbo 400 Trans/205 T-Case |
![]() |
![]() |
![]() |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|