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10-18-2009, 08:18 PM
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#1 |
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Registered User
Join Date: Oct 2008
Location: Parsons, KS
Posts: 652
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Stumped
I was helping my dad with the 1ton he just bought, we were trying to get the tail lights, turn signals and brake lights to work. The right turn signal is all that worked when you turned on the left turn signal, when he got it. When we got started the wiring was a mess, so we removed alot of wiring and tied into the factory wiring that is back there and got the left brake light and turn signal working but that's all that works back there. I checked the fuses, we changed the flasher (that's when the turn signal started to work) we found a broken wire up by the firewall and reconnected it and we still didn't have anything on the right.
Anyone have any ideas of what might be going on? He is wanting to take this truck to pick up a parts truck for it next weekend so we are trying to get it fixed as soon as we can.
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74 GMC SWB Project "Sin-thia" Static Dropped 8"f/10"r http://67-72chevytrucks.com/vboard/s...d.php?t=460030  97 GMC reg cab short bed, 4.3V6 / 5spd, daily driver 220,000 miles, all stock for now |
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10-18-2009, 08:40 PM
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#2 |
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Kid's Mechanic
Join Date: Nov 2006
Location: Kansas City
Posts: 8,241
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Re: Stumped
Have you looked at the wiring at the back,old trailer light wiring is a good place to start
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10-18-2009, 08:49 PM
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#3 |
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72 BB C30 Super LongHorn
 
Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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Re: Stumped
Check all of the grounding wires and locations at the taillight assembly in question.
Check the receiver socket where each in question bulb is secured and make sure you have a clean area of contact minus any rust or condensation build up. Like Powerdriver said, check any additional wiring added that is part of any trailering wiring. From there, work your way back up to the fuse block, then to the interior wiring inline. Back tracing it from the easiest pointe to the most difficult is a start!
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS 
Last edited by RPOZ11; 10-18-2009 at 08:51 PM. Reason: sp |
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10-18-2009, 09:36 PM
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#4 |
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Registered User
Join Date: Oct 2008
Location: Parsons, KS
Posts: 652
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Re: Stumped
We replaced everthing from about the rear end back, just behind the rear end is where we tied into the factory harness. The factory wires are brown, green, yellow and light green. Brown is for park lights and tag light, green is ground, yellow is left turn and stop and light green is right turn and stop? Am I wrong?
__________________
74 GMC SWB Project "Sin-thia" Static Dropped 8"f/10"r http://67-72chevytrucks.com/vboard/s...d.php?t=460030 97 GMC reg cab short bed, 4.3V6 / 5spd, daily driver 220,000 miles, all stock for now Last edited by Conundrum; 10-18-2009 at 09:40 PM. |
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10-18-2009, 09:43 PM
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#5 |
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Kid's Mechanic
Join Date: Nov 2006
Location: Kansas City
Posts: 8,241
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Re: Stumped
dark green is right turn and stop
light green is backup yellow is left turn and stop brown tail lights any black wires are ground |
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10-18-2009, 09:50 PM
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#6 |
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Registered User
Join Date: Oct 2008
Location: Parsons, KS
Posts: 652
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Re: Stumped
Ok, thank you.
Does it make any difference that it is an 80 with a 4spd? I should have mentioned that in the beginning but I forgot.
__________________
74 GMC SWB Project "Sin-thia" Static Dropped 8"f/10"r http://67-72chevytrucks.com/vboard/s...d.php?t=460030 97 GMC reg cab short bed, 4.3V6 / 5spd, daily driver 220,000 miles, all stock for now |
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