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what would go bad with the socket? When can a person get a replacement socket? Do they patch in by soldering the new one in?


I know I've checked the blubs and they are good. This car, when the turn signal is on the larger blub blinks and the smaller blub that adjoins it blinks too but they alternate. That little blub does nothing, I believe it stays lit when the left turn is on ......

do I need a special tester for this?

since it does work, meaning both the left and right come on .... is it safe to assume it is not the relay or the actual turn signal switch in the steering column?

I suspect there must be some sort of short in the system.


Some days both blinkers work just fine and other days. the left one blinks fast in the rear but the front left does nothing.

How common is it where the socket is the culpret?

When testing how does one know what is ground and what is hot/blink/hazzard and hot runing light?

Yeah, it may be simple but not even the experts can fix it.

I've had it to the local pontiac dealer several times for this issue and they tell me it's dirty connections.

They say they clean and then put that goop on to keep the moisture out.

However, I've done the same and it still continues to plague the car.

I don't think I can do too much harm to it.... Will see what I find when the car is here over the weekend.

Alright.... I suppose it's over my head but I'm looking for help and appreciate the advise you give.

I have not gotten a test light yet but I think I've confirmed there is no power to the left side turn signal.

I disconnected the left headlamp assembly and plugged it in on the right side and threw on the right blinker.

Everything worked. So is it fair to say the socket is not bad?

The other thing I noticed is the smaller blub that blinks on and off when the main blinker is on does light when the head lights are on so it seems that is getting power... however, when it's all hooked up nothing happens to the left side when the left blinker is turned on.

That said, where should I go next to trouble shoot? Blinker Relay?

I got a test light and probed around and I can only get the test light to light on one of the the three wires.

I took both headlamp wiring harnesses and plugged them into both the right and left. they both work just fine on the right. they do not work on the left.

All blubs are functional all the way around the car.

My son who drives the car told me today that during one stop / left turn it worked. Meaning the flasher didn't blink fast and the turn signal light in the dash lit up.

However, it's intermittent.

While messing with the left harness it started to work. Seemed it was positional. I checked all the wires and there is continuity.

There was a ground splice but I checked it too and it's clear.

The only thing that I seen that seems odd is that the turn signal lights in the dash only work on the right when the harness is disconnected. It blinks fast but on the left with the harness disconnected it does not light at all in the dash.

Could that help diagnose the problem?

That last point was not clear..

When both the left and right are working correctly the dash turn signal lights work. Blink at a regular pace, etc.

However, when the left is not working .. the left dash blinker light does not light at all.

But if I disconnect the right side and turn on the right blinker or flashers the right side dash blinker lights but the left does not.

Seems to me if the right acts that way... then so should the left. Meaning that if the left turn signal is out or unplugged the left should blink fast but the left dash blinker should light up but it's not.

does this help provide any insight as to where I can further troubleshoot this issue??

Ok. just so I'm clear...

the MultiFunction switch has individual wires that control each of the four turn signals...

I guess I just assumed that if the left was working in the back there must be a short of some sort....

In any event, where can I get a wiring plan so I can see which wires I should be looking at....

Well, I got the turn signal switch out...

there are three plugs.

One is black and has numbers/wires that run from 1-17

One is grey and has numbers/wires that run from 1-13

One is a small black plug with two wires

that said, how do I use this mapping back to that wiring chart you show?

I should be able to use a tester to test all four signal connections correct?

So, I'll admit this is way over my head but let me continue to try if you don't mind helping me...

I see there are two solid yellow wires on the grey connector...position 7 and 13.

To test the switch alone do I not need to connect to another wire to complete the circuit?

e.g. a ground and the wire that controls the left front turn signal. So if I have the turn signal on and the multi-meter connected the circuit should be intact if I take the signal off of the left position it should break the circuit, correct??

Also should I just be testing the continuity or should I be using the mulitmeter a different way?

Your testing for power coming out of the switch on the yellow wire when the turn signals are on. I can't help you much beyond that. Someone is going to have to know how to identify and test the wire.

I thought there were individual wires for each of the four signals...

You point to the Yellow wire but shouldn't I be looking also at the LtBlue and DkBlue wires too?

I know at the turn signal socket there is no yellow wire.

OK... I got a new turn signal switch and am in the process of replacing it but didnt get far....

How do you get the top part of the steering column shroud off?

It's loose and have the bottom one off but the top I cannot get off due to the plastic around the key. The plastic part.

Anyone know how to get that off?

I'm at a stand still now...