turn signals
Thread Starter
|
Junior User
Joined: Oct 2012
Posts: 82
Likes: 0
turn signals
I have a strange problem. My turn signals wont work when it is cold outside the emergancy flahers have never failed and work when the turn signals are on the blink. I can run the truck with the heater on and they will start working after 10-15 min. I have not put a lot of effort in fixing this but I have relaced the flasher relay and the turn signal switch. I have never seen or heard of this problem have any of yall.
Senior User
Joined: Mar 2012
Posts: 492
Likes: 0
From: Jenkintown, PA
This is a very interesting problem.
The flasher relay and multi-function switch have both been replaced, so that rules them out. The turn signals start working after the cab heats up, so that pretty much rules out the individual lamps and associated wiring.
The flasher relay gets power from 2 fuses, #1 (20A) which is hot all the time, and #23 (10A) which is hot in run. My guess is that fuse 23 supplies power for the turn signal function since they only operate in run.
I would look closely at fuse 23 and its associated contacts in the fuse panel. There might be an intermittent loose connection that expands ever so slightly and starts working when it warms up. It probably wouldn't hurt to just replace that fuse.
Have you had any windshield leaks that might have gotten the fuse panel wet?
The flasher relay and multi-function switch have both been replaced, so that rules them out. The turn signals start working after the cab heats up, so that pretty much rules out the individual lamps and associated wiring.
The flasher relay gets power from 2 fuses, #1 (20A) which is hot all the time, and #23 (10A) which is hot in run. My guess is that fuse 23 supplies power for the turn signal function since they only operate in run.
I would look closely at fuse 23 and its associated contacts in the fuse panel. There might be an intermittent loose connection that expands ever so slightly and starts working when it warms up. It probably wouldn't hurt to just replace that fuse.
Have you had any windshield leaks that might have gotten the fuse panel wet?
Thread Starter
|
Junior User
Joined: Oct 2012
Posts: 82
Likes: 0
Thank you Chris. The expansion thing is something I considered. The info you provided will help in that search. My best guess is that the ground for both turn signals and flashers are the same so possibly no problem there. I will check the fuse and other connections. Thanks again.
Thread
Thread Starter
Forum
Replies
Last Post
djmaniak
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
6
Mar 21, 2010 01:18 PM
mgdemarco
1987 - 1996 F150 & Larger F-Series Trucks
6
Nov 13, 2008 03:47 PM
