Turn signal light in tach - not working

Verify that you have the 4 pin flasher. It may have been replaced with a 3 pin unit. See SO Bill early flasher conversion #1.

TURN SIGNAL FLASHER CONVERSION 1 ( VERY EARLY).pdf

It is definitely the 4 pin flasher.  I have isolated the problem to the flasher and need a new one but it is no longer available.  I found one that may work:

https://www.autohausaz.com/pn/91461830311

And here is a photo of the little gem ...

And more...

John

I believe Jon Haas makes one also.

You were just one click away when you were  on Mike Dailys website. Look at the conversion number one and the conversion number two. It allows you to replace the four pin with a readily available and readily replaceable three pin.

conversion number two adds a relay to retain the dash mounted signal indicator light

I retained the indicator light but did not add an additional relay. I used 3M diaper tap connectors to the appropriate wires coming out of the flasher harness. This required the use of two diode‘s, rewiring the two prong bulb holder, and a proper ground for which I repurposed the OEM orange relay wire, simply grounding it to the OEM relay panel - my reasoning being that grounding was the original purpose of the orange wire, anyhow 😉

Those four pin flashers are very difficult to locate. Very rarely have I seen any and they seem to range around $150-$200 each

Larry

I used the 3 prong flasher and diodes in another car.  It works perfectly.  Thank you.

But this one seems similar to the one in my current car.  Its dimensions are different but functionally the same.  It is $26 shipped.  Am I missing something?  Its looks like I can plug it in and it will work.

https://www.autohausaz.com/pn/91461830311

Steve, think your picture is the correct thing. (if you open it up it is full of electronic). The plug you can check if it ihas connection on ALL 4 terminal, hence 4 pin flasher and socket will work is a (old) standard in europe

And yes the flascher internal connect the pin to ground. R is going to fuse = + bat. If I am correct this pin going to thhe buld is  just an internal "duplicate" connetion to the "output" pin going the the adequate light bulbs left or right. -So doubble check from any + bat  and a needle in the orange wire for contact as input for a volt meterOR just a spare bulb..set either flash light on /ignion on..etc..and you fence the real problem in. WELL it also tells you if the tach bulb is broken.

I had some problems in "flashing" neither right nor left. Did buy a new now fully electronic flasher - guess same as yours above -  from Hella ( Have it a home currently skiing). My issue was the broken "hazard" switch in the middle of the diagram above, as one internal contact was broken (BMW 2002 part 100€)

So there are cheap flascher from Hella or Bosch. (< 10 USD plus ship ..sorry my wife just left to FL) .get you the part number Wednesday--- if yours is not working.

Mat...from the ski slopes.

Forest is correct...Jon Haas makes a replacement 4-wire replacement that fits under the Bosch cover.

John

I seem to have this same issue. The dash turn light works when turning right, but only works for a few "blinks" when turning left.  I've checked and cleaned all the contacts, but the issue still comes & goes. I guess after 50 years it's time is up.

If you have the later car with three prong flasher check your bulb and ground on the right side. The bulb gets power from the front turn signal light on the side activated but grounds through the filament to ground on the opposite side.

I received the Wherle flasher today.  The only issue with it is that it pulses positive to the orange wire instead of grounding.  This requires a minor wiring change to the indicator light in the tach.  The red wire (positive) gets disconnected and capped off and is replaced with a ground wire.  The one I received even says Made in Italy.

And, thanks to John Buckman for helping with this.

You're welcome, Steve.  Glad it worked for you.

John