Blower motor stopped working

Tiny
VIPERKING75
  • MEMBER
  • 2000 DODGE VAN
  • 5.2L
  • V8
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
The blower motor in my van just went out. A few months ago it was giving me troubles, I found the resistor harness was burnt up. I changed the plug, and the resistor and it worked fine for a few days, then I lost all speeds but high. Then today it just stopped working all together. The plug has a good connection, and I replaced the resistor just to be safe, it didn't help. So I changed the motor, it started working for a few seconds on all speeds then quit again. The relay is grounding out like it should but I'm not getting power to the motor, or anything at the resistor.
Thursday, July 16th, 2020 AT 12:25 PM

17 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good afternoon,

I attached the wiring diagram for you of the blower motor system.

https://www.2carpros.com/articles/how-to-check-wiring

Do you have a test light or voltmeter to do some checks?

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

The resistor and harness burned up the first time from the blower motor drawing too much current. You should have replaced the blower and resistor at the same time.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check the fuses for power on both sides with the key on.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Roy
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Thursday, July 16th, 2020 AT 12:36 PM
Tiny
VIPERKING75
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I do have a volt meter, fuse is good, and if I had the money at the time when it first went out I would have.
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Thursday, July 16th, 2020 AT 1:05 PM
Tiny
ASEMASTER6371
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Okay, you need to get or borrow from someone a test light so we can do some checks. The fuse is not a visual test, it is a power test to be sure power is at the fuse.

Let me know when you have the test light and we can continue. You can get one for under $10.00 at a parts store.

Roy
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Thursday, July 16th, 2020 AT 1:21 PM
Tiny
VIPERKING75
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All right, I found my test light, where would you like me to start?
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Thursday, July 16th, 2020 AT 3:05 PM
Tiny
ASEMASTER6371
  • MECHANIC
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Okay, check the 2 fuses for power on both sides in the first diagram I sent you.
Roy
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Thursday, July 16th, 2020 AT 3:19 PM
Tiny
VIPERKING75
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The one in the dash has power through. I can't check the one in the engine bay, but it does have power on one side and the fuse has continuity.
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Thursday, July 16th, 2020 AT 3:43 PM
Tiny
ASEMASTER6371
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Okay, go to the relay. Check for power on the red/dark green and the black/orange wire with the key on.

Roy
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Thursday, July 16th, 2020 AT 4:10 PM
Tiny
VIPERKING75
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I have power to 86, the other 3 are ground.
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Thursday, July 16th, 2020 AT 4:39 PM
Tiny
VIPERKING75
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86 is positive, 85 is ground, 87 is ground that connects to 30 ground. I have continuity from 87 to 30 when relay is on.
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Thursday, July 16th, 2020 AT 4:43 PM
Tiny
ASEMASTER6371
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Okay, 86 is good. 30 should have power as that is the load side of the relay.

30 is fed by the 50 amp fuse in the fuse box. If the fuse is and you have power on both sides, then you have a harness issue between the fuse box and pin 30 on the relay.

Roy
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Thursday, July 16th, 2020 AT 4:45 PM
Tiny
VIPERKING75
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I have ground to motor through relay but no positive at any of the resistor wires.
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Thursday, July 16th, 2020 AT 4:45 PM
Tiny
VIPERKING75
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I always thought Dodge used their relays to break ground, not positive.
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Thursday, July 16th, 2020 AT 4:47 PM
Tiny
VIPERKING75
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Never mind, I was checking the wrong relay, the one in the dash is bad.
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Thursday, July 16th, 2020 AT 4:52 PM
Tiny
VIPERKING75
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I appreciate all your help.
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Thursday, July 16th, 2020 AT 4:55 PM
Tiny
ASEMASTER6371
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Okay, how did you determine that?

You are welcome.

Roy
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Thursday, July 16th, 2020 AT 5:06 PM
Tiny
VIPERKING75
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I flicked the relay, it clicked on, then the blower came on.
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Thursday, July 16th, 2020 AT 5:19 PM
Tiny
ASEMASTER6371
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Okay, hope it stays working for you.

Thanks for the update.

Roy
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Thursday, July 16th, 2020 AT 5:23 PM

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