Flasher woes...
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New User
Joined: Nov 2002
Posts: 4
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Flasher woes...
I have a '76 F250 that's driving me a bit nuts. My blinkers only work when no other electrical accessory is on. When nothing is on they work great. As soon as I turn on any other electrical load, i.e., brake lights, parking lights, heater, etc, the blinking rate slows until they don't flash at all. When I turn off the other accessories they return to normal function. I've recently replaced the alternator, voltage regulator and ICM. What's wrong? Thanks! 
New User
Joined: Jan 2008
Posts: 0
Likes: 24
Flasher woes...
The system itself is the problem.
The dimmer switch,headlight switch,turn signal switch,T/S flasher,
4-way flasher are all intertwined.
You will have to do seperate circut tests.
I personally think it will be the turn signal switch that is causing the problem.
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The dimmer switch,headlight switch,turn signal switch,T/S flasher,
4-way flasher are all intertwined.
You will have to do seperate circut tests.
I personally think it will be the turn signal switch that is causing the problem.
[font color=red]Dennis
FTE Assistant Administrator
[/font]
[link:www.ford-trucks.com/guidelines.html|Club FTE]
[link: motorhaven.autoanything.com|How YOU Can Support This Site]
http://www.clubfte.com/users/mil1ion/canada_flag_animated.gif
[link:www.clubfte.com/users/mil1ion/Mil1ion.html|My Website,"North Of The 49th"]
Post Fiend
Joined: Apr 2002
Posts: 7,157
Likes: 1
From: Central Kali
Flasher woes...
Check your battery voltage and the voltage at the input of the flasher. It sounds like the voltage drops when you turn other stuff on. If the voltage is too low, the flasher won't work. 
It's only $2 for the standard one, and only about $8 for the electronic one.
Post Fiend
Joined: Jun 2002
Posts: 13,873
Likes: 3
From: Atlanta GA
Flasher woes...
As it works in a 1971, the flasher supplies (+) to the turn signal switch for the lamps. The headlamp switch contains two relays, one for the headlamps, one for the other lamps. I would tend to think that the flasher(s) is bad.
