Intermittent electrical problem
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Senior User
Joined: Jan 2005
Posts: 228
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From: sourthern NJ
Intermittent electrical problem
My son's '94 w/5.0 is having an intermittent electrical problem with lights. Some nights everthing works as it should. Other times, the tails lights and dashboard light do not light up, but the brake and headlights contiue to operate as they should. Where should I start to look first?
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
Main light switch first. They are notorious for over-heating and scorching contacts. ALL of the lighting circuits run through the main light switch at some point. Remove the switch completely to check for burnt or melted contacts. The connector on the switch is pretty hefty and can appear just fine until you disconnect it from the switch.
This is not to say that this is the only possibility, simply where I would start looking.
This is not to say that this is the only possibility, simply where I would start looking.
Elder User
Joined: Feb 2007
Posts: 757
Likes: 0
From: Nikiski Alaska
I agree with greystreak92, i have had several 92-7 ford trucks and atleast 4 of them have had the plug on the back of the headlight switch melt or the switch itself burn. On three of them i attributed it to the hi and low beams being run at the same time. Whether by holding the dimmer switch or that box that wires them that way. And also running aux. lights without running them through a relay, and off of the low beams will overload the switch too.
