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03-29-2008, 12:34 AM
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#1 |
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Registered User
Join Date: Jun 2007
Location: oregon
Posts: 1,069
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headlight problem
Not a chevy, but similar truck manufacturing, 1975 |Jeep.......................I am driving to work and the lights flicker.......then go out entirely........I stomp the switch for low beam and they come back........back on Hi and they kick out. drove in with lo and picked up another switch for hi lo on the way home.........changed it....took 5 minutes. checked out to be okay.
This morning get in turn on lights all okay........then back out of driveway and lights out...........same thing all over again. some people suggest the headlight switch itself can cause this Any ideas on this????
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69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears: 
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03-29-2008, 02:13 AM
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#2 |
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Registered User
Join Date: Nov 2007
Location: Sask Canada
Posts: 1,666
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Re: headlight problem
the head light wires after the dimmer switch are shorting out causing the head light circit breaker to heat and open causing the lights to go off. it cools off and resets and the lights will work for a time till the breaker heats and opens.
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Trueman Last edited by 463; 03-29-2008 at 02:14 AM. |
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03-30-2008, 06:19 AM
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#3 | |
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Registered User
Join Date: Nov 2007
Location: Sask Canada
Posts: 1,666
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Re: headlight problem
Quote:
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Trueman |
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03-30-2008, 07:30 AM
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#4 | |
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Registered User
Join Date: Jun 2007
Location: oregon
Posts: 1,069
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Re: headlight problem
Quote:
 You definitely called this one for sure. I replaced the switch for good measure and in a hope that it fell into the diagnosis from friend who was told that the hi beam circuit draws more amps and will trip the circuit where as a lo beam doesn't run as hot. I went along with it because i didn't feel like tracing down the unknown wire short in freezing weather. outside. I gambled the simple switch change would get it..............at the same time in the back of my mind my gut instinct agreed with your diagnosis. Oh well. All fixed and lotsa spare parts to boot!!!! 
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69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears:
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03-31-2008, 03:02 AM
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#5 | |
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Registered User
Join Date: Oct 2007
Location: Garageless, Missouri
Posts: 408
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Re: headlight problem
Quote:
Please don't ever say that out loud again.
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R.I.P ESLL Even as the body dies the spirit lives on in the people you touched |
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03-29-2008, 05:21 AM
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#6 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: headlight problem
I've had the wires leading to the dimmer switch get corroded and cause an open circuit.
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03-29-2008, 05:30 AM
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#7 |
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Registered User
Join Date: Jun 2007
Location: oregon
Posts: 1,069
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Re: headlight problem
always something to distract from where I realy want to be working!!!! Gotta get to work though. I will check the wiring
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69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears:
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03-30-2008, 06:09 AM
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#8 |
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Registered User
Join Date: Jun 2007
Location: oregon
Posts: 1,069
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Re: headlight problem
well went and payed 33 bucks for a light switch to change out. put it in and still a problem.... found this finaly!!!!!
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69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears:
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03-30-2008, 06:11 AM
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#9 |
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Registered User
Join Date: Jun 2007
Location: oregon
Posts: 1,069
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Re: headlight problem
you can see the spot on the fenderwell where the wires had rubbed for the last 33 years and rubbed through the hi beam wire. 10 cents worth of black tape and the dailuy is back on the road.. Maybe the spare parts will fit my Chevy???
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69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears:
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03-31-2008, 12:14 AM
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#10 |
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Registered User
Join Date: Nov 2007
Location: Sask Canada
Posts: 1,666
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Re: headlight problem
happy to see you got it fixed. without the lights it's hard to hold the flashlight out side the door with it on and trying to drive 55. thanks for posting your findings 463
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Trueman |
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