I've recently encountered (2) un-related problems. First my rear left window motor would roll down, but not up. I've tried 2 good motors from a donor car, all with the same results. I've also swapped good switches and still the same problems. Second problem happened while installing a tachometer in place of the clock, now my odometer and trip odemeter doesn,t work. I disconnected the battery before I started.I've checked the connections and everything seems to be fine. Also the instrument panel doesn't light up, checked the rheostat seems to be good. Could I have shorted something? is there anything else to check. All the other instruments still work(speedometer, new tach,gas and temp gauges). Any suggestions will be greatly appreciated.
thanks in advance.