Where is blower motor relay located?
Locate your vehicle’s blower motor relay. In the vast majority of vehicles, you can access the relay through the glove compartment.
How do you test a fan blower switch?
Test the switch. Plug the connector back in to the blower motor, and then trace the wire harness back to the connector closest to the blower motor switch, usually located under the dash. Disconnect the connector and set the multimeter to ohms.
How to replace a heater blower motor switch?
Remove the nut that holds the switch to the dashboard with the appropriate sized deep well socket. You should be able to push the switch toward the inside of the dashboard and get it out where you can handle it. Step 4: Access the switch. Accessing the switch from behind can be very tricky. The older your car is, the easier this job will be.
What should I do if my heater fan switch is not working?
As long as there are no bare wires exposed, reconnect the battery cable and try running the heater fan to see if there is other diagnostic work to be done. If everything checks out, disconnect the battery again, route the switch back through the hole, and attach it with the nut.
What happens when you change the fuse on a heater blower?
If the fuse is blown, replace it and then try the blower. If the fuse blows right away, your car may have a bad blower motor or some other problem in the system. If the blower works when you change the fuse, you may not be out of the woods yet. When the motor gets old and tired it will draw more current through the wires than a new motor.
How do you replace the relay on a heater?
Step 3: Replace the relay. With the key still in the off position, plug the relay back into the slot. Turn on the key and try the blower. Some relays may not activate until the car is running and have a built in delay so you may need to start the engine and wait a few seconds to see if your repair was successful.