1989 GXL
So my right rear blinker is the only working blinker. I read about it may be the flasher control so I attempted to try and solder some of the nastier looking joints. It didn't make a difference. Bulbs are all good. I guess my options are replace the flasher cpu and that's about it? This is probably a popular topic haha. Any help/ advise would be great.

 

Check for power at the sockets. Or close to them old sockets could get corroded. Can you hear the relay clicking with the left blinker?

 

I can hear the relay clicking with the left, but not the right. I'll have to check the sockets when I have a few minutes tonight or tomorrow. Also, the arrow light comes on with the left and blinks fast, but not the right at all.

 

fast blinking usually indicates a bad bulb on that side.

 

Or mismatched bulbs.

 

It's weird though because I took the cpu out and resoldered some points on it and it blinked normally. Then, the next day it started blinking fast again. It never had more bulbs working than the drivers side rear though.

 

correct soldering or possibly another cold solder joint like from factory?

 

Well I have partial good news! I pulled the front left signal out and changed the bulb again and cleaned up the housing and it worked! I here the right side clicking, but no lights work yet. I ran out of time before I finished cleaning the right front housing so I can report later. Does it matter if the right arrow in the cluster blinks or not? The left does and the right doesn't.

Edit: I'm stupid. the cluster arrow is probably just a bulb out.

 

Had a similiar issue before. Turned out the Turn signal Housings upfront went bad. The Ground wire had broken off of the bulb holder. If they are corroded really bad, when they are serviced, the movement can brake the contact for the ground wire. From memory the power wires are soldered on and the ground is...pinched on?

Try swapping the front turn signal housings and plug the working side into the other and see if it works

 

Well I decided to take the flasher cpu out and give it one more once over. I found one solder joint that was completely broken. Pulled of the soldering iron and soldered it back together. Plugged everything back in and wallah, I've got full blinkers. It also gave me the cluster arrow back! Left still blinks too fast though. Maybe the plug upfront is corroded. Haven't looked yet. Thanks everyone for the tips and tricks!

 

Corroded sockets don't cause fast blinking, wrong bulbs do.

 

It's a brand new bulb and I even tried switching the left with the right.

 

Let's go back a step. When you check the function (walk around the car, or <hint> park at night in front of a reflective mirror building), which bulbs aren't working?

The fast blinking is basically, IIRC, higher resistance, so I concur it could be a dirty socket or bad connection on the light housing.

edit: If switching bulbs doesn't make it worse or better, try using a multimeter to check the voltage at the socket. Also, you can use a long wire to ground the housing (wire from housing negative/ground to negative on battery or a good known ground) and see if a bad ground is the problem.

 

That's why I'm thinking one of the blades on the plug may be corroded. The socket was "clean". I just haven't pulled the plug on the drivers side yet. Tonight I will though.

 

I have constructive things to say sometimes.

 

And I appreciate the constructive things