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Blower Motor Works Briefly, Then Trips Off

Big T

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Thread starter #1
After about 20 minutes, can repeat the process. Motor works for about a minute, then shuts off. I recently replaced the resistor on top of the motor.
 

Will L.

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#2
Can you get an inductive amp gauge over the wire feeding it and see if it is increasing load before stopping? If so sign of motor going or loosing it’s ground.
 

Big T

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Thread starter #5
Can you get an inductive amp gauge over the wire feeding it and see if it is increasing load before stopping? If so sign of motor going or loosing it’s ground.
Have no idea what you're talking about. Please explain with more detail and in simpleton language.
 

Big T

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Thread starter #11
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#14
It can point to the blower motor pulling more juice than normal but the connection is also a weak link. Measuring the amp draw is the only real way to tell
 

Big T

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Thread starter #16
I went out and put the amp meter on it. It pulls 19.6 on the uA setting. After about 30 seconds, it starts to get hot and then it loses connectivity and motor goes off. Jiggling the wire gets the motor going again. So it sounds like the plug is bad. What do you do for a replacement?
 

Big T

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Thread starter #17
Blower control module is only on vehicles with auto temperature control. All others got just the resistor.

Having trouble finding a plug replacement.
 

WarWagon

Well it hits on 7 of 8...
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#18
I would cut the wires back to where they are not burned, crimp, solder, and tape it up. The connector is for the assembly line. You may have to replace the wire if its coroded or melted a long run.

Then I would replace the high hour/ mile blower motor as IMO high amp draw is a possibility for failure. So is age and corosion on the connector. AC Delco IMO are quiet vs. cheap loud knock off motors.

Add a ground strap to the blower motor to body. Ground resistance adds problems to the circuit.
 

Big T

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Thread starter #19
Rockauto does not offer an AC Delco Blower Motor. I looked up the part on AC Delco's site and they give a Part # 15-80665. I do a search and Amazon has this AC Delco Blower Motor for $77.73 with free shipping. However, I get the disclaimer that it does not fit my 1999 Suburban K2500. So I'm confused at this point.
 

WarWagon

Well it hits on 7 of 8...
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#20
Can you return the motor free shipping if it doesn't fit?

This is the type of wire repair I suggest. No crimp on this one. Aluminum foil catches drips.

100_5107.JPG 100_5106.JPG
 
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