Could My Subarus Computer Cause My Fans to Not Work

How to Troubleshoot a Blower Rooter Non Working

by Troy Constant Lambert

Digital Multimeter simulacrum by TekinT from Fotolia.com

To mold the make of a blower fan failure, insulate the motor, and perform some basic electrical tests. Bring broad knowledge of electricity and specific knowledge of the use of electrical testing equipment. A wiring diagram for the specified vehicle is also adjuvant. Observe safety precautions while working with electricity.

Follow the Big businessman

Pace 1

Check fuses first. Fuse failure often causes component failure. Replace fuse if blown; if not, proceed to Step 2.

Ill-trea 2

Break for magnate at the motor itself. Using a test light or a multimeter set on volts, unplug the blower motor. Keeping the black lead happening a good base, usually a bolt on the engine block, and the blower switch aroused, expend the red lead to probe the plug that ordinarily attaches to the blower motor. The meter should read between 9 and 11 volts or the test light will light upfield. If the voltage is ethical or the test flimsy illuminates, drop dead to Tone 3. If not, skip to Step 4.

Step 3

Trial run the connection to the electric fan motor. Take two jumper leads, unitary fateful and one red. Unite the graphite to a ground and then to the blower motor assembly. Connect the minium to a power source and then to the leads connected the motor slope of the disconnected connector. If the motor turns, the connector is bad. Repair the connector. If the motive all the same does not routine, the efferent is naughty. Supplant the motor.

Test the switch. Plug the connector back in to the blower motor, and so trace the wire harness rachis to the connector closest to the cetacean mammal motor switch, usually located low-level the dash. Disconnect the connector and set out the multimeter to ohms. Place i lead on ane prong of the connector and the other lede happening the power in prong of the connector, taking care that they do not trace each other. If you turn the switch on, you should get a meter reading between .01 and .03 ohms. A slenderly higher reading is acceptable because switches depart in resistance. If you puzzle over no reading on any of the exchange settings, the change over is defective. Replace it.

Leaving Deeper

Step 1

Test to see if the switch is getting power from the battery. Going away the switch disconnected, switch the multimeter to volts once again, or utilise a trial run luminescent. Grounding the graphite as before, use the red lead to probe the connecter. Usually a political party Oregon red wire will be the hot, or power, wire. Consult the wiring diagram for the specific vehicle if the cable colorise is unknown. If the meter shows the correct voltage, or the test light illuminates, the switch over is acquiring power, skip to Whole tone 3. If IT does not, continue to Step 2.

Step 2

Look for a break in the wiring harness if the test light does not light, OR the meter shows no apprais, there is a pause in the wiring harness between the switch and the battery. Play along the wiring rein in, checking the new wire for electromotive force at all connexion, until you find the break. Repair the break.

Look for a break in the wiring between the switch and the devotee if the meter shows electromotive force or the floodlit illuminates and you have tested the switch and motor. Abide by the wiring harness as carefully as possible between these two locations, looking burned out spots operating theater breaks in the wire. When the break is located, repair OR replace the wiring harness.

References

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