Still having electrical issues - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ol Curt · 11-25-2009, 06:56 PM

I solved my alternator problem today. I had two wires switched in my main harness plug. Now I have a good charge and no gen light. Yeah!!

But, I don't have any bright lights. I have dims, and my bright light indicator comes on when I hit the dimmer switch, so I don't think it is in the switch. I don't have 12 volts at the light plug at the radiator support. Also don't have any voltage on the light green wire at the plug that goes thru the firewall. I am looking at the wires under the dash and it appears the wires go thru the fuse panel, but aren't fused. Is that correct?

astrochimp · 11-25-2009, 07:10 PM

Check at the dimmer switch. Mine was bad, did the same as your.

David

ol Curt · 11-25-2009, 07:27 PM

Had 12 volts on both sides of dimmer switch. I guess I could just run a wire from dimmer to headlights to check wiring in between

.

**slepysal** · 11-25-2009, 07:43 PM

Three things come to mind: bad grounds, or as it was in my case, the main harnnes plug , the one that conects to the fire wall.
I cleaned mine up and solved my no hiigh beam problem , after changing out the dimmer. or the plug that conects to the rad support
keep us posted

ol Curt · 11-26-2009, 03:37 AM

Even though mine is new, I continue to have some issues with the plug at the firewall. I ran a new 14 ga. wire from the dimmer switch to the light plug at front and all works well now. I had to wiggle the main plug to have power at the ignition switch, but once I did all was well. I'm considering eliminating the plug and just making physical connections for all those wires, particular the main power wire.
I'm going to do the headlight relay upgrade this weekend and get some ground straps installed. My electrical gremlins are eventually being chased away one at a time!

11-25-2009, 06:56 PM	#1
ol Curt Junior Member Join Date: Dec 2006 Location: Newburgh, IN Posts: 1,247	Still having electrical issues I solved my alternator problem today. I had two wires switched in my main harness plug. Now I have a good charge and no gen light. Yeah!! But, I don't have any bright lights. I have dims, and my bright light indicator comes on when I hit the dimmer switch, so I don't think it is in the switch. I don't have 12 volts at the light plug at the radiator support. Also don't have any voltage on the light green wire at the plug that goes thru the firewall. I am looking at the wires under the dash and it appears the wires go thru the fuse panel, but aren't fused. Is that correct? __________________ 1966 Chevy C10 Longbed I'm Bob....ol Curt was my Grandpa The truck was his and he sure as heck wouldn't understand why I took a perfectly good truck and tore it down!

11-25-2009, 07:10 PM	#2
astrochimp Registered User Join Date: Aug 2009 Location: Unionville Mo. Posts: 217	Re: Still having electrical issues Check at the dimmer switch. Mine was bad, did the same as your. David

11-25-2009, 07:27 PM	#3
ol Curt Junior Member Join Date: Dec 2006 Location: Newburgh, IN Posts: 1,247	Re: Still having electrical issues Had 12 volts on both sides of dimmer switch. I guess I could just run a wire from dimmer to headlights to check wiring in between. __________________ 1966 Chevy C10 Longbed I'm Bob....ol Curt was my Grandpa The truck was his and he sure as heck wouldn't understand why I took a perfectly good truck and tore it down!

11-25-2009, 07:43 PM	#4
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	Re: Still having electrical issues Three things come to mind: bad grounds, or as it was in my case, the main harnnes plug , the one that conects to the fire wall. I cleaned mine up and solved my no hiigh beam problem , after changing out the dimmer. or the plug that conects to the rad support keep us posted __________________ 1960 Apache long bed fleet L6 250 Clifford intake 2 bbl carb. Langdon cast headers with dual exhaust and bellflower tips. T-5 5 speed, power steering and power disc brakes. "Over, Around or through it... " Last edited by slepysal; 11-25-2009 at 07:44 PM.

11-26-2009, 03:37 AM	#5
ol Curt Junior Member Join Date: Dec 2006 Location: Newburgh, IN Posts: 1,247	Re: Still having electrical issues Even though mine is new, I continue to have some issues with the plug at the firewall. I ran a new 14 ga. wire from the dimmer switch to the light plug at front and all works well now. I had to wiggle the main plug to have power at the ignition switch, but once I did all was well. I'm considering eliminating the plug and just making physical connections for all those wires, particular the main power wire. I'm going to do the headlight relay upgrade this weekend and get some ground straps installed. My electrical gremlins are eventually being chased away one at a time! __________________ 1966 Chevy C10 Longbed I'm Bob....ol Curt was my Grandpa The truck was his and he sure as heck wouldn't understand why I took a perfectly good truck and tore it down!

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