13-10-2016, 03:14 PM
Hi, I realize this is a common topic but I'm having real trouble trying to trace the problem with my heater/blower - the actual motor is the Denso one. I have replaced a blown relay and also replaced the resistor which was probably fine. I've bench tested the motor and it works. I only seem to be getting about 5 volts to the motor and I don't think that is enough to make it work. I just had a prod around at the back of the heater blower controls on the dash and looking at the big ampage wires in the middle (black, orange, white and yellow/green - I think) I get 14V (full battery charge - engine running) when the switch is at OFF but as soon as I turn the switch to on I get nothing on the multimeter. Does anyone know how this unit is supposed to work? I don't know if I could still have a faulty relay or if the switch is just bust.
Does anyone have any advice or experience of testing the switch?
Does anyone have any advice or experience of testing the switch?