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09-14-2007, 02:50 AM
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#1 |
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Registered User
Join Date: Apr 2007
Location: Visalia, CA.
Posts: 327
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what the heck?
allright fellas, I have a 68 pickup that seems to hate having its headlights turned on! The truck will sit in idle very good, but as soon as I turn the headlights on, the darn truck turns off!!
 I replaced my dimmer switch because I seen that the wires where it connects to the switch were melted, thinking this would cure my problem, but no way. Could it be the headlight switch? what do you guys think? think I need another alternator?
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68 c-10 1/2 ton swb fleetside, 79 GMC Sierra Grande 1/2 ton swb fleetside, 99 Dodge Durango 4x4(wifes ride  ),53 and 55 chevy trucks(dads trucks )54 caddy 62 series 4 door(younger sons ride, aka 54caddy )70 caddy 2 door, 89 chevy silverado stepside(older sons rides )
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09-14-2007, 03:11 AM
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#2 |
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KEEP ON TRUCKIN'
 
Join Date: Jun 2005
Location: Sterling, Va.
Posts: 5,730
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Re: what the heck?
Sounds like it could be your voltage regulator and /or alternator to me. Alternator does not usually do that but it's possible if the regulator is bad.
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JIM '97 GMC Sierra K1500 '95 Chevy Silverado C1500 '71 Cheyenne Z71 / LT1 & 4-Speed SWB K/10  Father/Son Projecthttp://www.youtube.com/watch?v=4l689JKXPnA http://67-72chevytrucks.com/vboard/payments.php "LIVIN' FREE FOREVER" 
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09-14-2007, 04:28 AM
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#3 |
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Registered User
Join Date: Jun 2007
Location: Behind you!
Posts: 29
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Re: what the heck?
Do the lights work? Both of them? What about when it's not running? Only at idle? Any idea what melted the wires on the dimmer?
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'72 K10 Cheyenne Super Kingsland, GA Last edited by Fe2o3; 09-14-2007 at 04:51 AM. |
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09-14-2007, 05:30 PM
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#4 | |
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Registered User
Join Date: Apr 2007
Location: Visalia, CA.
Posts: 327
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Re: what the heck?
Quote:
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68 c-10 1/2 ton swb fleetside, 79 GMC Sierra Grande 1/2 ton swb fleetside, 99 Dodge Durango 4x4(wifes ride ),53 and 55 chevy trucks(dads trucks )54 caddy 62 series 4 door(younger sons ride, aka 54caddy )70 caddy 2 door, 89 chevy silverado stepside(older sons rides )
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09-14-2007, 04:36 AM
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#5 |
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Registered User
Join Date: Jun 2007
Location: Behind you!
Posts: 29
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Re: what the heck?
You may be grounding out the ignition system somewhere. Like on some lawn mowers. Kill the switch it goes to ground and kills the engine. Melted wires are always suspect. I'm no mechanic, so I'm just guessing here.
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'72 K10 Cheyenne Super Kingsland, GA |
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09-14-2007, 05:16 AM
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#6 |
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Registered User
Join Date: Feb 2004
Location: Idaho
Posts: 4,033
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Re: what the heck?
No Not The Dreaded Electrical Problems>>>>
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"Remember, They can Kill You, but they can't eat You, That's against the law!!!!!!!!!" |
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09-14-2007, 08:03 AM
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#7 |
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Registered User
Join Date: Aug 2007
Location: Rochester, NY USA
Posts: 70
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Re: what the heck?
My vote is a bad ground. Turn the key on (not start) and turn the headlights on. Does the ignition switch get hot?
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09-14-2007, 03:16 PM
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#8 |
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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: what the heck?
Put a multimeter on the battery while it is running, if it is less than 13 volts, you have a charging issue.
That's my vote. Keep it simple, electronics are not that hard. |
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09-14-2007, 09:14 PM
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#9 |
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Registered User
Join Date: Dec 2006
Location: southern Utah
Posts: 103
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Re: what the heck?
when the lights are on with engine running, then battery isnt used. The alternator must drag down for the load, if the regulator senses this it can kill the engine thru the red wire.
Wiring may be grounding or i vote regulator.... |
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