Turn signal weird behavior - rears only on 97 1500
#31
I can fully document the exact happenings, but, basically - and only with the REARS:
- With no headlights or brakes on, and not in reverse - turn signals work fine. Not the brightest in the world, but, blink properly. (I think if I look closely, I can see the opposite side blinking ever so slightly - will confirm tomorrow).
- With headlights or running lights on, blinking slows down considerably, and if turning right (passenger), I can clearly see the drivers' side blinker ...blinking. Same for when turning left (drivers) I can see right/passenger side blinking. I also believe I can faintly see - on the smaller filament - the reverse lights blinking. (I'll confirm).
- With lights on and then step on brake, with turn signals on, I get NO tail lights, however the brake light at top of cab goes on.
- If I'm in reverse with turn signals on, none of them work (again, I will confirm 100% what happens tomorrow - but essentially this is what's going on).
#32
#34
I can fully document the exact happenings, but, basically - and only with the REARS:
- With no headlights or brakes on, and not in reverse - turn signals work fine. Not the brightest in the world, but, blink properly. (I think if I look closely, I can see the opposite side blinking ever so slightly - will confirm tomorrow).
- With headlights or running lights on, blinking slows down considerably, and if turning right (passenger), I can clearly see the drivers' side blinker ...blinking. Same for when turning left (drivers) I can see right/passenger side blinking. I also believe I can faintly see - on the smaller filament - the reverse lights blinking. (I'll confirm).
- With lights on and then step on brake, with turn signals on, I get NO tail lights, however the brake light at top of cab goes on.
- If I'm in reverse with turn signals on, none of them work (again, I will confirm 100% what happens tomorrow - but essentially this is what's going on).
#35
I can fully document the exact happenings, but, basically - and only with the REARS:
- With no headlights or brakes on, and not in reverse - turn signals work fine. Not the brightest in the world, but, blink properly. (I think if I look closely, I can see the opposite side blinking ever so slightly - will confirm tomorrow).
- With headlights or running lights on, blinking slows down considerably, and if turning right (passenger), I can clearly see the drivers' side blinker ...blinking. Same for when turning left (drivers) I can see right/passenger side blinking. I also believe I can faintly see - on the smaller filament - the reverse lights blinking. (I'll confirm).
- With lights on and then step on brake, with turn signals on, I get NO tail lights, however the brake light at top of cab goes on.
- If I'm in reverse with turn signals on, none of them work (again, I will confirm 100% what happens tomorrow - but essentially this is what's going on).
The following users liked this post:
jpilk99 (10-01-2020)
#38
Got the new multifunction/turn signal switch and (you guessed it) it didn't fix the problem. I feel like I'm back to square one, but, worse in that I've checked the wiring harness at the rear of the truck and am not finding any problems with the wires. I have a gut feeling (as many others here have suggested) that the issue is grounding. That black plastic connector next to the Power Distribution Center and Battery has one wire (two together into one connector actually) that I could not get continuity to the ground attachment at the battery. The other 3 were fine.
BUT I HAVE NO IDEA WHAT THIS ONE (combo) GROUND IS FOR? I can't decipher the FSM as I am not seeing that level of "layman"s detail - a drawing of the engine compartment with that ground connector and then a direct picture or detail of where each ground wire goes. And especially since it would not ohm-out (no continuity) I'm assuming the wire is broken somewhere in the harness so how I can test for continuity at the end points (if that makes sense).
Can someone get me off the cliff here? I am so frustrated that I can't drive this awesome truck, (that I just spent 2 months bringing back to life - and it's running great), because without reliable blinkers/brakes/running lights etc. ...I'm a danger to other drivers. Sorry if I'm missing something basic here, but, I just don't know what to do, short of ripping out the entire wiring harness, unwrapping all the tape etc. and visually inspecting every inch of every wire...
Thank you for all the help folks!!!!
Jay
BUT I HAVE NO IDEA WHAT THIS ONE (combo) GROUND IS FOR? I can't decipher the FSM as I am not seeing that level of "layman"s detail - a drawing of the engine compartment with that ground connector and then a direct picture or detail of where each ground wire goes. And especially since it would not ohm-out (no continuity) I'm assuming the wire is broken somewhere in the harness so how I can test for continuity at the end points (if that makes sense).
Can someone get me off the cliff here? I am so frustrated that I can't drive this awesome truck, (that I just spent 2 months bringing back to life - and it's running great), because without reliable blinkers/brakes/running lights etc. ...I'm a danger to other drivers. Sorry if I'm missing something basic here, but, I just don't know what to do, short of ripping out the entire wiring harness, unwrapping all the tape etc. and visually inspecting every inch of every wire...
Thank you for all the help folks!!!!
Jay