odd turn signal and light problem
Thread Starter
|
Senior User
Joined: Mar 2010
Posts: 190
Likes: 0
odd turn signal and light problem
so Ive owned this 78 f150 for awhile now. when i got the truck it had no brake lights and no taillights, and random lights where out.
I took it apart, cleaned sockets new bulbs and i got the taillights working.
heres where my problem is:
Day time driving, the blinkers work, brake lights work ect.
Turn the headlights on:
turn the right side turn signal on and the indicator in the dash stays on NO blink?
the right brake light, when you push the brakes, instead of lighting up it goes out?
I have cleaned all the sockets, checked grounds, rewired the rear harness for the lights because someone added janky trailer wiring, soldered and cleaned up everything and no change.
also took the front harness apart and cleaned those up and re grounded everything.
so lights on, NO passenger blinker, and brake lights goes out.
Lights Off. NO problems. everything works fine???
I took it apart, cleaned sockets new bulbs and i got the taillights working.
heres where my problem is:
Day time driving, the blinkers work, brake lights work ect.
Turn the headlights on:
turn the right side turn signal on and the indicator in the dash stays on NO blink?
the right brake light, when you push the brakes, instead of lighting up it goes out?
I have cleaned all the sockets, checked grounds, rewired the rear harness for the lights because someone added janky trailer wiring, soldered and cleaned up everything and no change.
also took the front harness apart and cleaned those up and re grounded everything.
so lights on, NO passenger blinker, and brake lights goes out.
Lights Off. NO problems. everything works fine???
Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
Check and make sure that the ground wire is firmly pressed into the offending bulbs socket and making good contact, i had the exact same scenario play out on my truck, lights off and blinker worked fine, lights on and blinker didn't work and indicator arrow remained illuminated (not blinking) it may not be your problem but it was mine, these electrical quirks can be quite frustrating to chase down sometimes.
More Turbo
Joined: Nov 2006
Posts: 538
Likes: 11
From: Great N/W
EASY fix (on the tail at least). The ground is bad on the bulb that goes out when the brakes are applied. Either in the socket or the the ground wire grounding the socket itself.
I did this intensionally on an older car with multiple tail/brake lights. Cutting the ground wire makes the tail lights work and the brake light goes out when applied.
I did this intensionally on an older car with multiple tail/brake lights. Cutting the ground wire makes the tail lights work and the brake light goes out when applied.
Elder User
Joined: Jul 2003
Posts: 668
Likes: 2
As others have stated, it's probably a ground issue. I've seen this problem dozens of times on these trucks. If you did what you say you did, replace the rear tail light socket's with new ones, and get back with us here. I'd almost put money on this..LOL If you had a schematic, you can see the ground path via a bulb filament and how the ground path sorta kinda opens (not really, but it is beyond this discussion) when power is applied to the head\tail light circuit.
Thread
Thread Starter
Forum
Replies
Last Post
crsweet78
1973 - 1979 F-100 & Larger F-Series Trucks
21
Aug 4, 2012 12:37 AM
oldschool84f150
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
2
Oct 13, 2009 12:07 AM
boggerted
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
2
Sep 23, 2008 09:27 PM
