Snowplow Forums banner

1 - 4 of 4 Posts

·
Registered
Joined
·
491 Posts
Discussion Starter #1
Guys, I'm having a turn signal issue with my '02 F-250 that started this morning out of the blue. Seems that when the signal switch is set for a right hand turn and the brakes are applied, the signal will then become solid, not flash, and then blow the fuse. Evedently something with the brake light circuit is overloading the turn signal circuit and not canceling when the turn signal is activated.

Here are a couple of things I have tried to narrow down the culprit.

1) Left turn signal works fine regardless if the brake lights are operating.
2) Brake light circuit operates fine by itself.
3) Right turn signal works fine but there seems to be a back-feed of power causing the center third brake light as well as the left side rear brake light to flash in unison with the right side. If brake lights are then activated, the flash stops and becomes constant thus blowing the fuse.
4) Emergency Hazzard lights work perfect but the center third brake light again flashes as well which reverts back to some type of back-feed of power. Also, when brake lights come on, flashing turns to constant light and then blows the fuse again.

Lastley, All bulbs were checked and are good. Flasher and all relays have been swapped and checked out. Brake light switch seems to check out. Multifunction signal switch has been replaced.

Possibly a chaffed harness allowing one circuit to breech into another as well as blowing the fuse is my next direction. Your thoughts?

Thanks

Jake
2002 F-250 Super Duty 5.4 V8
 

·
Tileman's Boys
Joined
·
1,094 Posts
Trailer plug or splice for it
 

·
Registered
Joined
·
491 Posts
Discussion Starter #4
Found the issue with my lights. After tearing into everything and having no luck, I decided to crawl underneith and follow the harness from the rear bumper up to the front firewall area. I found that the entire harness somehow got pinched between the top of the frame rail and the underside of the cab body by the driversdie footwell. The harness was torn open and three wires were exposed and shorting out against one another as well as the frame rail. Once I pulled the harness out from underneith the body, all electrical functions went back to normal operation. I cleaned up and rapped everything then sleaved the entire harness in a peice of hose plus wrapped it tight with zip ties. All is good.

"The Boys", thanks for your input. The trailer plug is stock and all connections were good. Although weathered, everything was tight.

Jake
 
1 - 4 of 4 Posts
Top