hans14914

I still havent been able to get turn signals working on the GTS. When the stalk is flicked either left or right, the indicator light on the dash remains solid on, and there is no external activation of any signal lights.

The hazard circuit functions correctly, both flashing all corners and the in-dash indicator light.

The switch has been removed and cleaned several times. When testing it with the meter, the switch seems to work - there is continuity between 49a and R or L when the stalk is pressed either way.

All other functions of the switch operate properly, as does the cancellation mechanism.

When looking at the schematics, it is clear to me how the hazard circuit works, when the switch is pressed, it bridges pin 49 on the flasher to 30 (unswitched +12v). I don't see how the turn signal switch activates the flasher module so assume that may be where the issue is. If anyone can help explain how the turn signal switch energizes pin 49 of the flasher, that would be extremely helpful.

Thanks
Hans

Mike Simard

I just used a 928 hazard to wire a car from scratch and know this subject well but I'm away from my notes, argh!

Google "hella hazard switch" and you'll get some clean schematics that will help. It all becomes clear when you're not focused on the 928 schematic jungle.
The key is that the emergency flashers get power from the battery and the turn signals from switched power. The schematic should show a set of contacts inside the switch involved with that function.
When I get to the shop I'll try to compose some helpful descriptions.

Mike Simard

BTW, have you tried another flasher relay?
it's possible to work with the full load of hazards but the turn signal may not have enough current to activate the flashing.

Mike Simard

OK, I have my notes now.
I think you just need a new flasher relay and there's no need for in depth analysis, the fact that you have a solid light that's not flashing implies everything works except the relay doesn't have enough current without the additional hazard to 'flash'.
Since you asked:
Pin 49 on the hazard switch is the supply going to the flasher relay, it's passing along either switched power normally(15) or battery(30) when the switch is activated. 49a is from the flasher relay and that's also going to the stalk(49a).

Alan

Do you have LED lights installed in the turn signals? if so this is your issue.

Otherwise you may have the wrong wattage bulbs installed - you need 21w in the back, the front indicators are dual 21w/5w combo bulbs...

If the wattage is too low the flasher won't work (will just stay on). The hazzard combines all 4 corners so adds more (2x) wattage and this can be enough to make it go...

Alan

hans14914

Bulbs are all correct, even tried swapping some new ones from the package in - no effect.

Took a known working relay from my 89 and 88 parts car, no change.

Hazards still work. Turn signals do not have any exterior effect, and the dash indicator remains solid.

Any other ideas?

Thanks
Hans

Mike Simard

Are the 4 exterior lights actually blinking with the hazards? The switch is but are the lights?

hans14914

That is correct, all corner lights function properly with hazard switch, as does the light in the switch and the pod.

Thanks
Hans

ThetaTau87

Sounds like you may have a broken wire between the stalk switch and the flasher relay. You can check this by running a wire from the switch to the relay and see if that fixes the issue.