The heater blower motor is not working on this vehicle with ign on getting battery voltage at red wire at blower motor with engine idling voltage at blower motor falls to
zero volts. This vehicle has A/C. Does anyone know of issues with this particular
problem. Any feed back greatly accepted
best Reguards Mickeybo
I don't quite understand what you are saying, but the fan will not run without the engine running but the thick red wire should be live even if the engine is not running, the switching being done by the control unit. If the voltage is dissapearing from the main feed check your under bonnet fuses, on XMs the fuse holder sometimes fails as its not really up to carrying the current.
Thes blowers have a built in voltage regulator circuit consisting basically of two transistors, these can and do fail, initially the speed control becomes intermittent then stops altogether.
Loss of power supply to the main blower motor wire could be a fault with the ignition switch.Try running an alternative power supply to this wire and see the result.hth
