88 F-350 Light Switch Problem
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Joined: Oct 2003
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From: Southern California
88 F-350 Light Switch Problem
First things first. 1988 F-350 Flatbed, I have already changed the headlight switch and a relay thinking this was the problem. The problem I'm having is when I pull on the 3 position headlight switch, the headlight come on but no running lights. The weird thing is, the first position is off the second is the running
lights the third, running lights and headlights. But when I place the
switch in the second position the running lights don't come on. If I pull the switch a hair more the running lights come on but I hear a click under the hood which is the relay I already replace and it made this sound with the old one. When I pull the switch to
the third and last position the running lights go out and the headlights come on.
DO I HAVE A SHORT ON MY RUNNING LIGHTS? And is that what that relay is for? To protect the headlights?
I really need a explanation on what the heck is going on. I can usually figure out electrical problems but this one has me baffled!
Thanks in advance
Rich
lights the third, running lights and headlights. But when I place the
switch in the second position the running lights don't come on. If I pull the switch a hair more the running lights come on but I hear a click under the hood which is the relay I already replace and it made this sound with the old one. When I pull the switch to
the third and last position the running lights go out and the headlights come on.
DO I HAVE A SHORT ON MY RUNNING LIGHTS? And is that what that relay is for? To protect the headlights?
I really need a explanation on what the heck is going on. I can usually figure out electrical problems but this one has me baffled!
Thanks in advance
Rich
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Joined: Jan 2001
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From: Virginia
The only way to check what's going on is to pull the headlamp switch out, plug it up, and probe it with a voltmeter. The running lights are fed separately from the headlamps, even though there is only one headlamp switch.
