I’ve got a problem trying to track down issue with turn signal indicators staying lite up when I turn on park or head lights. They do blink when used but just stay bright when not. Stuff I’ve read says bad ground ! But doesn’t really say where I should start looking for it. It’s on my 88 Blazer and damn there’s a lot of wiring under dash !! All help Appreciated .
CK5
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Turn Signal Issue
- Thread starter MrHappy
- Start date
is this rear only? might be brake related also...
I had CRAZY stuff happening with my turn signals for a while. IT was a ground issue. I ended up finding a post somewhere here on CK5 that finally got me pointed in the right direction.
start taking your tail lights, marker lights and turn signals out one at a time for inspection. need to check any of the body grounds that are in the area of that particular light fixture. obvious stuff like rat damage and wires that have been broken/ rubbed through are usually easy... nasty ground screws and corrosion...
but on my 1988? almost every ground wire was broken from vibration - IN THE BULB SOCKETS- where the little metal tabs are crimped on the wires and shoved in to the socket.
this causes intermittent issues and weird things like left signals causing a right signal to blink as the the energy passing through a bulb backfeeds through the ground side of another bulb instead of finding true body ground... I thought the blinker system was possessed for a while. I ended up having to replace all but one of the bulb sockets and wire leads in the whole truck (I meant in the whole turn signal/ marker light system).
I had CRAZY stuff happening with my turn signals for a while. IT was a ground issue. I ended up finding a post somewhere here on CK5 that finally got me pointed in the right direction.
start taking your tail lights, marker lights and turn signals out one at a time for inspection. need to check any of the body grounds that are in the area of that particular light fixture. obvious stuff like rat damage and wires that have been broken/ rubbed through are usually easy... nasty ground screws and corrosion...
but on my 1988? almost every ground wire was broken from vibration - IN THE BULB SOCKETS- where the little metal tabs are crimped on the wires and shoved in to the socket.
this causes intermittent issues and weird things like left signals causing a right signal to blink as the the energy passing through a bulb backfeeds through the ground side of another bulb instead of finding true body ground... I thought the blinker system was possessed for a while. I ended up having to replace all but one of the bulb sockets and wire leads in the whole truck (I meant in the whole turn signal/ marker light system).
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The turn signals do blink correctly when pushed all the way on, but one side is only engaged slightly it blinks radically. That’s probably my starting point. Thank You, I’ll see if this is it or ?? I seem to have more brain farts, these days.
I would start checking the front for poor grounds. I also clean the terminals for the power as well.
Take the bulb that blinks radically and try it on the other side. See if it blinks normal.
When the bulb is out clean out the socket and check the contacts in there. Look on the back side and check the grounds.
Also check and make sure the flasher hasn’t vibrated slightly loose.
When the bulb is out clean out the socket and check the contacts in there. Look on the back side and check the grounds.
Also check and make sure the flasher hasn’t vibrated slightly loose.
Check all the bulbs, there are 2 filiments sometimes one breaks and connects to the other.
Inspect your trailer plug wiring.
Inspect your trailer plug wiring.
Sounds good, I don’t believe I even have trailer plug wiring, but I’ll check in to that also.
