89 GTI cabrio rev counter wiring diagram please

I think I saw a wiring diagram for the rev counter but I can't find it now?? Could someone share it with me please? I have Plumped the connector and Spliced in a new ground to pin 2(brown) (according to briano1234) This fixed my clock (yipeeee) But my rev counter and temperature gauge are not working. some help please? Thank you

check the voltage on the 10V stabilzer 3 pronged transistor looking think on the upper right as you look at the back.

One leg is Battery or pin 14
Middle leg is ground (pin2)
The last leg is 9-10.5V

If those aren't there then you may have an issue of the stabilizer being bad, and or it isn't getting the proper voltage.

If the fuel gauge isn't working it cound be needed to be back fed.

There is a how-to in the archive section on that as well

The 10V stabilizer is a FA7810-Aet  1.00 or less at a good electronic store, or 45 dollars from dealer or vw heritage….

91 similar

https://www.ebay.co.uk/itm/7810-Regulator-Lm7810-1-5A-10Pcs-Voltage-L7810-10V-Ic-New-N/112369130850?hash=item1a29b8dd62:g:4s0AAOSw4GVYH3Xr

Is this the 10volt stabiliser I need???

https://www.ebay.co.uk/itm/FAIRCHILD-SEMICONDUCTOR-LM7810CT-LINEAR-VOLT-REG-1A-10V-TO-220AB-3/182121435689?epid=653776163&hash=item2a67489229:g:2HUAAOSw~oFXLLwq

Or is it this one????

My temperature gauge started working today and!!! Red light comes on at ignition. Now I just got to sort the rev counter. I need help to find the correct 10volt stabilizer.

the one I use is a KA7810AETU

The ebay one is rated at 1.5A where as the AETU is 1.0

Make sure that your connections on your Coil are nice and tight and clean.