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11-27-2011, 12:29 AM
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#1 |
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Registered User
Join Date: Aug 2010
Location: Clinton, Mississippi
Posts: 40
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High beam / Low beam light switch problems
I have a 1970 GMC and when I turn my lights on they work just fine but when I turn on the high beams and leave them on for 15 to 20 minutes all my lights will start blinking and then go out until I turn off the high beams. I have installed new lights and dimmer switch. "HELP"
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11-27-2011, 01:07 AM
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#2 |
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Registered User
Join Date: Jan 2004
Location: Wyoming
Posts: 641
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Re: High beam / Low beam light switch problems
Are the lights Halogen? I blew a regulator a couple yeas ago with halogen bulbs. Do you have an internal or external voltage regulator?
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11-27-2011, 01:21 AM
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#3 |
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Registered User
Join Date: Aug 2010
Location: Clinton, Mississippi
Posts: 40
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Re: High beam / Low beam light switch problems
Yes, I do have Hogelon and I have a internal voltage regulator.
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11-27-2011, 01:51 AM
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#4 |
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Registered User
Join Date: Jan 2004
Location: Wyoming
Posts: 641
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Re: High beam / Low beam light switch problems
I had trouble with an external regulator. Not sure if the regulator is heating up? Lets hope someone others have some ideas as well.
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11-27-2011, 10:58 AM
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#5 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: High beam / Low beam light switch problems
the blinking is probably the circuit breaker in the headlight switch.
I would inspect all the wires from the dimmer switch to the headlights for damage, and if all looks OK then I'd replace the headlight switch. |
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11-27-2011, 12:51 PM
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#6 |
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20' Daredevil (Ret)
 
Join Date: May 2003
Location: Jefferson State
Posts: 13,810
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Re: High beam / Low beam light switch problems
Check the grounds on the core support too....
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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11-27-2011, 11:41 PM
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#7 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: High beam / Low beam light switch problems
it'd be a good idea to chack and clean the grounds, but odds are 99% that it isn't the issue here.
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11-28-2011, 03:01 AM
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#8 |
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Msgt USAF Ret
 
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,723
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Re: High beam / Low beam light switch problems
Are the halogens powered off of relays or does the power to them go through the light switch?
__________________
VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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11-28-2011, 10:05 AM
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#9 |
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Registered User
Join Date: Oct 2006
Location: denver nc
Posts: 105
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Re: High beam / Low beam light switch problems
On my 70 when I pull out on the light switch they come on and go back off. I can push the knob in a little and they come back on. I figure it's my switch. Play with yours and see if they go off and on.
__________________
70 CST Bunch of old Camaros 
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11-28-2011, 11:51 PM
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#10 |
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Registered User
Join Date: Aug 2010
Location: Clinton, Mississippi
Posts: 40
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Re: High beam / Low beam light switch problems
The power to my lights go through the switch....But I have also changed it out to a new one as well.
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11-29-2011, 12:51 AM
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#11 | |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: High beam / Low beam light switch problems
Quote:
Posted via Mobile Device |
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11-29-2011, 01:15 AM
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#12 |
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Registered User
Join Date: Dec 2010
Location: camrose alberta
Posts: 21
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Re: High beam / Low beam light switch problems
You could have a rubbed marker light wire. I had that on a car and the head lamps would go out on high beam.
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11-29-2011, 01:52 AM
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#13 |
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Msgt USAF Ret
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,723
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Re: High beam / Low beam light switch problems
Here are two diagrams that show how to wire up relays for the lights. They will allow the high current for the headlights to bypass the headlight switch and the dimmer switch. It should prevent the headlight switch circuit breaker from tripping.
__________________
VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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11-29-2011, 09:47 AM
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#14 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: High beam / Low beam light switch problems
Dont bother looking at the markers or tail lights... They have a fuse. The only things too look at is the headlight circuit.
Posted via Mobile Device |
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