Electrical issue(s) need help
Thread Starter
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Senior User
Joined: Sep 2008
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Electrical issue(s) need help
Hi guys,
Ive posted issues Ive had with my truck in the past and have had great responses and appreciate everyones help.
Which leads me to todays problem(s).
I have a 77 F150 that has an electrical issue.
when i turn the lights on they all light up fine. Except the right rear park and brake do not light up. and the left turn signal light is
illuminated steady in the dash.
When I put the left turn signal on, the rear works fine, but the front does not blink. I do hear the flasher at this time, (although at times I
have to jiggle the turn signal lever to make it work).
When I turn the 4 way flasher on,all lights light up and flash except the right rear. The left indicator in the dash still stays on without
blinking also.
The left turn signal in dash light stays on steady as long as the key is in the on position.
swapped out flasher to test it with the 4 way flasher and vehicle still had same problem. changed all 4 1157 bulbs. checked to see if there was power going to right rear socket. There was not, but it does have power to the disconnect plug at the bed coming from the cab.
Also noticed the power coming from the neutral safety switch stays constant when key is in on position and in park. (not sure if it is supposed to or not).
The right rear socket had a separate ground wire rigged to it (unknown why, because the factory ground checked out to be good.
also the right reverse light socket is non existent. Which is part of the confusion. why is the front left turn signal and signal in dash indicator acting up, when there is an issue with the right rear.
2 separate issues I suspect? Any ideas on trouble shooting procedures?
Ive posted issues Ive had with my truck in the past and have had great responses and appreciate everyones help.
Which leads me to todays problem(s).
I have a 77 F150 that has an electrical issue.
when i turn the lights on they all light up fine. Except the right rear park and brake do not light up. and the left turn signal light is
illuminated steady in the dash.
When I put the left turn signal on, the rear works fine, but the front does not blink. I do hear the flasher at this time, (although at times I
have to jiggle the turn signal lever to make it work).
When I turn the 4 way flasher on,all lights light up and flash except the right rear. The left indicator in the dash still stays on without
blinking also.
The left turn signal in dash light stays on steady as long as the key is in the on position.
swapped out flasher to test it with the 4 way flasher and vehicle still had same problem. changed all 4 1157 bulbs. checked to see if there was power going to right rear socket. There was not, but it does have power to the disconnect plug at the bed coming from the cab.
Also noticed the power coming from the neutral safety switch stays constant when key is in on position and in park. (not sure if it is supposed to or not).
The right rear socket had a separate ground wire rigged to it (unknown why, because the factory ground checked out to be good.
also the right reverse light socket is non existent. Which is part of the confusion. why is the front left turn signal and signal in dash indicator acting up, when there is an issue with the right rear.
2 separate issues I suspect? Any ideas on trouble shooting procedures?
Elder User
Joined: Sep 2009
Posts: 503
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From: nor cal
buddy when i got my truck i was having the same issues.. i was chasing wires for DAYS!!! i found out that the light bulb its-self was not grounding right, there was to much rust... then i also had to replace the indicator because that thing was worn out so i replaced that and 1 house for the light-bulb "i don't know the technical name so housing will do for now"
i scrubbed the copper on the lights and inside the housing and make sure the lights are inside the house correctly lol you know what im saying?
give that a try and come back
i scrubbed the copper on the lights and inside the housing and make sure the lights are inside the house correctly lol you know what im saying?
give that a try and come back
Thread Starter
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Senior User
Joined: Sep 2008
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The switch being bad does not surprise me. It does have a bit of play in it. Actually the column is going to be replaced with a tilt soon.
The socket are all good and clean, so I was figured it may be a ground also. The part that throws me off is the indicator light staying on. I was thinking that may be related to the switch, yet the front turn signal does not work.
The socket are all good and clean, so I was figured it may be a ground also. The part that throws me off is the indicator light staying on. I was thinking that may be related to the switch, yet the front turn signal does not work.
Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
Thread Starter
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Senior User
Joined: Sep 2008
Posts: 173
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Great advise guys. Looks like I will double check all my lighting grounds. What sux is that when I starting restoring the truck a few years ago, everything worked fine. Arrggh! Guess it's always something huh? 
