|
Hi Chris
My setup is the same as your drawing. There was no movement of the needle at all. Stayed on empty even adjusting VR2.
I can see the pulses on TB1-10 on the scope when I bench test it but I haven't scoped it in the car. The duty changes between 100% or 20% on the bench.
I'll do that this morning & try the capacitor too. I'll also measure the current between full & empty using the variable resistors.
The sender wire definately is not driving a coil. The VW uses stepper motors in the gauges. The wiring diagram just shows the sender wire going into the mysterious 'dash panel'.
I have found during this conversion that if there was a simple way or a complicated way to do things, VW always choose the most complicated way.
|