I have the FFR GPS gauges installed in my MK4 and for some reason the speedometer is not right.
I have installed a watchdaug electronic ignition with the Gen 2 Coyote engine.

Going to start the engine:
activate key fob ignition button turns red and speedometer says acquiring signal and all gauges activated fine.

Depress clutch and push start button and engine starts fine all gauges fine EXCEPT the speedometer goes "goofy" (loses signal and needle goes around to 180 and no readout.

Here's the kicker: When I pull the headlight switch out the speedometer goes back to normal and indicates proper info.

All gauges are fine and responsive while engine running. Speedometer works fine while go-carting. BUT if I push the light switch in to the off position The speedometer returns to "GOOFY NO SIGNAL" tech term haha.

Checked the wiring and everything is correct according to wiring instructions.

I'm going to call FFR today and see if they have a spare GPS Speedometer laying around they could send me for testing purposes.


I'm stumped!!! Any suggestions would be appreciated.