Wiring problem??
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Freshman User
Joined: Apr 2010
Posts: 30
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From: Nevada
Wiring problem??
Ok this doesn't have anything to do with th I6 but you guys are really helpful. The other day I replaced my instrument cluster on my 1980 F150 because my other one was all painted and crappy. When I put it back together, my right turn signal was different. Instead of the green arrow flashing, the brake light flashes. My right brake light on the truck flashes also bu not the front. It's not the bulb because I tried that. At first I thought that it was just the spots on the panel were different because of they way they light up but that's not the case. I never touched my turn signal switch or anything. Any ideas on why it's doing this???
Elder User
Joined: Dec 2000
Posts: 570
Likes: 1
From: Austin Texas (area)
did you replace the '80 piece with an '80 piece? I don't think a cluster from later models have the exact wiring as does the '80 and earlier do. IOW: your wiring harness doesn't exactly match the termination schematic for the cluster you installed. If that is the only problem you can track down the electrical schematic for your '80 and the one for the year cluster you replaced it with and see where the wire for that side turn signal should be terminated in the cluster attachment plug.
If you replaced an '80 with an '80, but one cluster was a gauge cluster and the other was a idiot light cluster, then the attachment plug wiring method and chassis harness might be different. The gauge cluster is an 18 terminal plug where the idiot light cluster is a 14 terminal plug in the '81/later models, so that would have been quite noticeable.....
If you replaced an '80 with an '80, but one cluster was a gauge cluster and the other was a idiot light cluster, then the attachment plug wiring method and chassis harness might be different. The gauge cluster is an 18 terminal plug where the idiot light cluster is a 14 terminal plug in the '81/later models, so that would have been quite noticeable.....
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Freshman User
Joined: Apr 2010
Posts: 30
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From: Nevada
The cluster is out of an 85 Bronco. Everything else works fine, the left turn signal works and the green arrow flashes, the high beam light comes on and the 4x4 lights up. One thing I noticed was the circuit board on the old cluster was red and the circuit board on the new was blue. Could that mean something?
Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
I believe the 80 was wired differently than the other years of that era. The signals to the different lights were different, so it would sound right that the turn signal would activate the brake light, etc.
Do you have both circuit boards?
Do you have both circuit boards?
Cargo Master
Joined: Mar 2008
Posts: 2,573
Likes: 207
From: Washington
This has come up before, you have to swap 2 wires in the plug.
https://www.ford-trucks.com/forums/9...good-deal.html
https://www.ford-trucks.com/forums/9...good-deal.html
Cargo Master
Joined: Mar 2008
Posts: 2,573
Likes: 207
From: Washington
OK I think I have found a better link.
https://www.ford-trucks.com/forums/9...ml#post8685268
Full thread here
https://www.ford-trucks.com/forums/9...-question.html
So... arent you glad I have a lot of time on my hands...
Jim
https://www.ford-trucks.com/forums/9...ml#post8685268
Full thread here
https://www.ford-trucks.com/forums/9...-question.html
So... arent you glad I have a lot of time on my hands...
Jim
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