WIPAC LED flasher problem - any suggestions?

[zzorbaa]

Hi all,

I've recently replaced the stock lights on my '94 300tdi with the WIPAC LED kit and the installation was easy enough. I've got some odd behaviour from the WIPAC flasher unit though, and I'm wondering if anyone has any advice.

When I start the car, the indicators won't work. I can't hear the relay clicking at all with the indicator stalk flicked left or right. Then, I switch my hazard lights on and there's a 50:50 chance of either nothing happening, or the relay energises and my hazards start flashing. If I then turn the indicator stalk left or right and switch the hazards off, the indicators will start working normally. If I switch off the car and switch it straight back on again, then I don't have to mess with the hazards; the indicators will just work normally. If I leave the car for longer than say, 15 or 30 minutes, then I have to go through the whole flick-the-hazards-on malarky.

I should add that I've still got incandescent bull bar repeaters and side repeaters, although I understand that that shouldn't affect the new flasher relay. I've also messed with the trailer resistance setting on the relay but that doesn't change anything. As an aside, my trailer indicator has never worked anyway, and I can't quite work out what the previous owner did with the trailer hookup at the back, except to say that it works when hooked up to a trailer. I'm using the stock harnesses and wiring, which worked fine beforehand and works fine when the indicators feel like playing.

Any thoughts? I was going to get the old relay back in after I've cut pin 7 as suggested on the forums, but I thought I'd post here in case someone read it and instantly knew where the ghosts in my car are. It's a 300tdi... it shouldn't have electronic ghosts!

Thanks in advance

[roverrescue]

If you look at the wiring diagram for your vintage
Everything runs through that hazard switch and they do play up
You can rebuild them it's usually loss of contact on the plungers

That will be your first port of call

Steve

[zzorbaa]

If you look at the wiring diagram for your vintage
Everything runs through that hazard switch and they do play up
You can rebuild them it's usually loss of contact on the plungers

That will be your first port of call

Steve

Thanks Steve. That's exactly what it was. When I pulled the switch apart, it was on its last legs.

Great call. Cheers.

[Red90]

Don't cut any pins!!! It should all work without problems other than the trailer light. If you want that to work, the RDX relay is a better choice.

Either the hazard switch is faulty or someone has messed with the wiring. You need to grab the wiring schematic and troubleshoot it yourself. My money is on a hazard with a that is the problem. All power for the signals runs through the hazard switch.

[zzorbaa]

So, it's progressed sightly. Fixed the old hazard switch as best I could but its time had come. Replaced it with a new one and now the problem is more predictable. If I start the car, no indicators. Flick the hazards on and the indicators work. Flick them off and then the indicators work normally from this point on.

I'm stumped. At least it's more predictable now, but I can't work out what would cause this. I doubt it's a loose connection or a bad earth because it's so predictable.

[roverrescue]

Has your LED relay got an adjustable dial on it?
Effectively varioster across the trip
Dial that in or replace relay with one that does

Steve

[zzorbaa]

It does. WFL7LED is the model number. Dialling it to any point doesn't seem to make a difference. I might go about hunting for a replacement to see how that goes.

[zzorbaa]

Some progress.

New LED globes arrived for my bullbar repeaters and when I put them in the problem went away.

What I also noticed was that when I pull the globes out of the side repeaters (the only incandescents left in the indicator circuit) that I get both sides flashing, so I must have a bad earth somewhere. We'll see what happens when the LEDs rock up for the side repeaters.

I see a lot of multimeter-ing in my future...

[Shoogs]

When I did mine the wiring as opposed to the diagram was the opposite, swapped over and all good...

[zzorbaa]

When I did mine the wiring as opposed to the diagram was the opposite, swapped over and all good...

Yep, same here. Had to cut and swap polarity on all of them