Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
07-19-2013, 09:45 PM | #1 |
Registered User
Join Date: Aug 2012
Location: Spokane, WA
Posts: 37
|
Low tail light voltage and no lights
Hey guys I'm having issues with my tail lights, I made a new harness from the firewall to the lights themselves, I have 10v with the brakes applied at the firewall connector, and it goes from 10v to 3v with the blinkers on. All the wiring is done the way it would have been factory. And each brake light has a ground from the housing to the underside of the bed. I also have 10v at the bulb sockets and new bulbs but no light at all. Any suggestions?
Posted via Mobile Device
__________________
Dallas 1969 C10 custom 1/2ton "Project" 2004 Volkswagen Jetta DD "On the internet Men are Men, Women are Men, and little Girls are FBI Agents" |
07-19-2013, 09:54 PM | #2 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
|
Re: Low tail light voltage and no lights
run a ground wire from the bed to the frame to complete the circuit
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
07-19-2013, 10:01 PM | #3 |
Registered User
Join Date: Sep 2007
Location: PA.
Posts: 178
|
Re: Low tail light voltage and no lights
Yup,what cdowns said...I had the same problem and it turned out the ground was bad. Ran a new ground wire directly to frame and problem solved.
__________________
_____________________________________________ 69 C-20 292, 4 spd O/D, 4:56 rears. No a/c p/s p/b p/w......restoration project,"Operation:Stovebolt" 78 C-10 305 TH350 new (old) daily driver 02 Suburban Z71 a.k.a. the family truckster 99 Silverado 1500 Z71 |
07-19-2013, 10:13 PM | #4 |
Registered User
Join Date: May 2013
Location: Oregon
Posts: 329
|
Re: Low tail light voltage and no lights
I bet that if you measure voltage at your ground wires you'd have 10 volts there too. A system that was working properly should have zero volts after the bulb.
|
07-20-2013, 01:37 AM | #5 |
Registered User
Join Date: Aug 2012
Location: Spokane, WA
Posts: 37
|
Re: Low tail light voltage and no lights
I ran a big 4 gauge ground from the chassis to the cab, and re ran the grounds from the housings to the frame. They are working better then ever thanks for the advice guys.
Posted via Mobile Device
__________________
Dallas 1969 C10 custom 1/2ton "Project" 2004 Volkswagen Jetta DD "On the internet Men are Men, Women are Men, and little Girls are FBI Agents" |
07-23-2013, 07:20 AM | #6 |
Registered User
Join Date: Mar 2012
Location: Okanagan Valley, BC, Canada
Posts: 1,237
|
Re: Low tail light voltage and no lights
I've got the exact same prob. I went to install LED tail lights and they don't light up. Tested the voltage at the tail light socket and its like 9 volts. Not enough to trigger the LEDs. I am going to make a good ground strap and hopefully it makes a difference. Good info guys thanks
Posted via Mobile Device
__________________
#teamlongbed "I refuse to go disc brakes. I actually love drum brakes. It makes for an adventure." - 50bomb 1978 Chevy shop truck - static 6/8" 1970 GMC 1500 - Accuair eLevel Resto-mod http://67-72chevytrucks.com/vboard/s...d.php?t=537497 |
Bookmarks |
|
|