2003 electrical issues
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Joined: Aug 2021
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2003 electrical issues
Hi folks. My 03 f250 is making me crazy with a few issues. Trying to see if anyone else had similar things. Once in a while when I put my blower motor on high the turn signal indicators on the dash will glow (not fully light up). Doesn't happen all the time. Sometimes my dash lights won't want to work. Sometimes my wipers wont want to work. Lately sometimes when I have my car trailer hooked up (bran new trailer so I know it's not that) if I put on the headlights the trailer brakes lock up. If I turn the lights back off the brakes are fine. If I turn the blower motor on the brakes lock up. turn the blower motor off , brakes are fine. I'm at a real loss what the hell is going on. I had looked at the trailer wiring including the brake controller which all appeark to be plugged into the factory harness which I didn't see anything really odd whtn I had part of the dash apart looking around. about 3 years ago I replaced the "GEM" module with a bran new ford one so I could get the transfer case to start shifting into 4wd. Other than that really never did anything to the electrical on the truck so I'm a bit confused. Anyone had anything close to that happen? Thanks in advance
Laughing Gas
Joined: Mar 2002
Posts: 952
Likes: 346
From: Newton Illinois
When things like turn signal indicators glow without being on usually indicates a bad ground, check for broken ground wires between the cab and the frame and between the frame and battery.
Junior User
Joined: Jun 2009
Posts: 91
Likes: 2
From: Arizona
Hi folks. My 03 f250 is making me crazy with a few issues. Trying to see if anyone else had similar things. Once in a while when I put my blower motor on high the turn signal indicators on the dash will glow (not fully light up). Doesn't happen all the time. Sometimes my dash lights won't want to work. Sometimes my wipers wont want to work. Lately sometimes when I have my car trailer hooked up (bran new trailer so I know it's not that) if I put on the headlights the trailer brakes lock up. If I turn the lights back off the brakes are fine. If I turn the blower motor on the brakes lock up. turn the blower motor off , brakes are fine. I'm at a real loss what the hell is going on. I had looked at the trailer wiring including the brake controller which all appeark to be plugged into the factory harness which I didn't see anything really odd whtn I had part of the dash apart looking around. about 3 years ago I replaced the "GEM" module with a bran new ford one so I could get the transfer case to start shifting into 4wd. Other than that really never did anything to the electrical on the truck so I'm a bit confused. Anyone had anything close to that happen? Thanks in advance
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