Hello,

I'm hoping I can get some help. I've read quite of bit of threads that have to do with turn signals not working and I still can't figure it out. 02 firebird, the turn signals just stopped working completely, front and back. The dash turn signals do not light up at all with right/left or hazards on. But when I tried the hazards the rear ones do blink (again the dash ones still don't come on). I replaced the turn signal flasher and I got the rear ones to work, but still no front ones or dash blinker lights. I even replaced the DRL module and nothing. Anyone experienced this? any tips? I'm not sure what else to check ( I checked all the fuses with a fuse checker and none are burned). Oh and when I press the lock button the front signal lights do flash on and off.

Thanks

 

Sounds like a similar issue my friend had as well. I was told there is a hazard flasher and a turn signal flasher. Did you replace both relays? Not sure if that would actually fix anything, but just throwing that out there. Hope you find a fix.

 

What ever happened to testing things rather than just throwing parts at it? Do you have a test light or multimeter? If not, you can get a multimeter for around $5 if you have a Harbor Freight store nearby. Or you can get a test light at any auto parts store for about the same amount.

First, do the daytime running lights work? If not, you could simply have a pair of burned out bulbs or the front sockets could be corroded (that's common in these cars). Normally I would suggest checking the front bulbs by switching them from side to side but since neither side is working, that wouldn't accomplish much. You could test the bulbs by putting them in tail light sockets and pressing the brake pedal (they're the wrong color but that would at least tell you if they are burned out). Or you could test the blue wire at each front lamp socket for power when the turn signal is on. Remember that the bulbs are dual filament - a dim filament for parking lights and a bright filament for DRL and turn signal. The fact that they flash the parking lights with the alarm does not mean that the bright filaments aren't burned out.

If you have power at the blue wires then either the bulbs or the sockets are the problem. If not, pull the radio to access the DRL module then test for power on the dark blue and light blue wires with the turn signals on. Those are the output wires that go to the front lamps. If there is power then you know the wiring is broken someplace between the DRL module and the lamps. If there is no power, test for power on the dark blue/white and light blue/white wires. Those are the input signal from the turn signal switch and flasher. If they have power then you know the DRL module is the problem. If not then the problem is further back - perhaps the turn signal switch, flasher, fuse or the wiring between them. If you get to that point without finding the problem then I can tell you where else to test to narrow down the possibilities.

I suspect you will find it is the bulbs, the sockets or the DRL module. I know you replaced the module but new ones are expensive so I guess you probably got a rebuilt or used one and we had another member who ended up with another bad one that way just a week or two ago. Testing the input and output is the only way to be sure.

 

Whitebird I understand, impatience got the best of me. I'm back into my senses and I ordered a test light. I will follow your step by step guide with the test light and I'll report back what I find. Thanks a lot, your input is much appreciated.

 

Ok so I picked up a computer safe circuit tester (3-28 volt tester light) I plugged it into a chassis bolt under the dash and tested with a known power source and light bulb turns on.

So now that I know the tester works I did the following:

Checked blue wire on turn signal socket (left and right) no power.

Removed radio to access the DRL and checked input and output (dark blue white strip, solid blue, light blue etc.. With ignition on and turn signal activated. No power ( just FYI the rear tail light blinkers do work) just not both fronts.

I tested the plug under dash that comes from the steering wheel (turn signal switch) I tested the purple (I believe it's input to the turn signal switch) no power.

:/ I checked the fuses again with the fuse checker and I get a solid green light (means it's good). I'm not sure what else to check... Any ideas whitebird?

 

Congratulations. Glad to hear that you found and fixed the problem without it getting too expensive.

(and yes, the purple wire is the turn signal power input to the switch - just for future reference)

 

I thought I had updated this but I guess not. FYI I fixed the problem which was a black plug under the dash that was not making full contact with all pins. I noticed it was loose so I pressed it back in and it make a click sound and was now fully seated and making contact with all pins. It's a black plug under the dash but right on the steering column.