Heater dont work
#4
While it is always a good idea to have a wiring diagram and Chassis Service Manual on hand, it is pretty basic to remove the wire from the motor, ck for voltage at the wire with light or meter or buzzer or etc.
If no volts, THEN you might need the manual for under-dash details.
If yes volts, then apply your own 12V to the motor lead right from the battery and see if the motor spins. One would assume not, if there was already 12V present at the wire.
Motor not spinning when fed 12V indicates a bad motor- or not grounded well perhaps- also easy to check with test light or meter. One might tap the motor lightly while it has power and see if you get one last run by jiggling stuck brushes into place. Or, just replace the motor.
"Just" can involve quite a bit of access dismantling depending on your exact model and whether AC stuff is involved.
Oh and there is sometimes a separate fuse inline under the hood for high speed of the fan motor.
If no volts, THEN you might need the manual for under-dash details.
If yes volts, then apply your own 12V to the motor lead right from the battery and see if the motor spins. One would assume not, if there was already 12V present at the wire.
Motor not spinning when fed 12V indicates a bad motor- or not grounded well perhaps- also easy to check with test light or meter. One might tap the motor lightly while it has power and see if you get one last run by jiggling stuck brushes into place. Or, just replace the motor.
"Just" can involve quite a bit of access dismantling depending on your exact model and whether AC stuff is involved.
Oh and there is sometimes a separate fuse inline under the hood for high speed of the fan motor.
Last edited by Octania; January 23rd, 2016 at 02:50 PM.
Thread
Thread Starter
Forum
Replies
Last Post