[toxicthom]

Usually I can handle most problems concerning my 1978 928 Porsche.
but two items are driving me a little crazy. one my headlights work well, at least they lite up as they should but the motor that should raise theme seems to have a mind of it's own when I turn on the headlights the motor continues to run causing the lights to go up and go down on a continuous pattern until I either turn of the lights or turn off the key. I replaced the headlight motor which I thought was bad it didn't help. Both motors did the same thing (Running constantly up and down) When I purchased this car the headlights were in this condition so I don't know if the wiring is correct at the connector or not. I have done most of the normal checks (grounds, wiring for shorts fuses relays and so on no help.

Second, the speedometer is not working as it should it shows speed up to 20 mph then it falls back to zero doesn't matter either way forward or backwards it shows the same reading. I replaced the speed sensor with new unit but same results. I removed the instrument panel and inspected the speedo but nothing looked bad or burned gears all seem to have there teeth in place. I think it time to throw in the towel as I have reached my limit of ability concerning the problems I hope someone has encountered these problems and can help me out, thank you in advance for any suggestions that might shed some light (no pun intended) on my problem.

Thank you