I bought a 1997 Gas Jetta with a blown 2.0 gas engine. I have changed to a rebuilt 1.6 diesel and am have some electrical issues with the dash. I ran the hot wire from the coil to the injection pump to turn on and off. I am using a voltage regulator to run the glow plugs. The problem I am having is the speedo, gas gauge and temp gauge are not working. The fuses are all ok, all other lights blinkers and horn are working. When the key is off the miles and the clock come on. When the key is on the miles and clock turn off. Somthing is backwards messed up. Any ideas?