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Username Post: New blower motor quit        (Topic#372444)
xstuntman 
Contributor
Posts: 122

Loc: west Texas
Reg: 04-13-09
01-23-23 05:39 AM - Post#2853635    

Just got to work and on the way the new blower motor was working for half a minute, then quit just as I switched over to defrost. Assuming that was just coincidence on the timing.

Haven't looked but betting on the fuse since it popped with the old squeaky motor too. Is there a resistor or something else in line I should be looking at? Gonna be a cold one tonite and probably need the defrost in the morning.



 
Liberty Valance 
Contributor
Posts: 150
Liberty Valance
Loc: Euless,Texas
Reg: 07-21-14
01-23-23 07:12 AM - Post#2853645    
    In response to xstuntman

If you have a meter, turn fan switch on and test connector on motor to confirm voltage and work from there.

1974 Cheyenne 10 LWB STOCK 350 W/HEI /TH350 /AC/ 4 BBL Quadrajet
Mopar by Birth
Chevy by Choice


 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25838
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
01-24-23 03:53 AM - Post#2853665    
    In response to Liberty Valance

The fan speed resistor is located on the evaporator housing. Slightly up and right of your blower motor. If the fan is squeaky, replace it. It's eating amps to spin. The amps will blow fuses. You can buy a motor with or without a squirrel cage. The OEM squirrel cage can be swapped over.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
xstuntman 
Contributor
Posts: 122

Loc: west Texas
Reg: 04-13-09
01-24-23 06:51 PM - Post#2853706    
    In response to gchemist

New resistors in and so far no blown fuse. Ran it on the speed just below hi for ten minutes. Too chicken to turn the fan on high yet until this cold front passes thru.

Crossing fingers.



 
Liberty Valance 
Contributor
Posts: 150
Liberty Valance
Loc: Euless,Texas
Reg: 07-21-14
01-24-23 07:41 PM - Post#2853711    
    In response to xstuntman

What year and model do you have?

1974 Cheyenne 10 LWB STOCK 350 W/HEI /TH350 /AC/ 4 BBL Quadrajet
Mopar by Birth
Chevy by Choice


 
xstuntman 
Contributor
Posts: 122

Loc: west Texas
Reg: 04-13-09
01-25-23 05:27 AM - Post#2853724    
    In response to Liberty Valance

'85 4wd Suburban.

Needed the defroster this morning, slid it on and saw the dash lights flicker, then heard a pop. Makes no sense since it ran for ten minutes the other day.



 
xstuntman 
Contributor
Posts: 122

Loc: west Texas
Reg: 04-13-09
01-25-23 04:06 PM - Post#2853749    
    In response to xstuntman

Gonna pick up a relay tomorrow and ordered a set of ATC fuse shaped manual reset circuit breakers which should be here Saturday.



 
xstuntman 
Contributor
Posts: 122

Loc: west Texas
Reg: 04-13-09
01-27-23 06:45 PM - Post#2853829    
    In response to xstuntman

Just FYI,

The set of 5,10,15,20,25, and 30 amp circuit breakers came early. Installed the 25 amp breaker, new blower motor relay, and so far everything works. After some reading a typical bad relay will pop the fuse so hopefully that was my problem.



 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25838
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
01-29-23 04:02 AM - Post#2853860    
    In response to xstuntman

Interesting. Can you post a part number to those circuit breakers?

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
1983G20Van 
Super Senior Member
Posts: 3981

Loc: Hurst, Texas, USA
Reg: 11-13-02
01-29-23 10:17 AM - Post#2853872    
    In response to xstuntman

  • xstuntman Said:
'85 4wd Suburban.

Needed the defroster this morning, slid it on and saw the dash lights flicker, then heard a pop. Makes no sense since it ran for ten minutes the other day.



Defrost activates the AC system. On an 85 it should have a throttle kicker solenoid on the carb, wiring to the cycling switch and the a/c clutch. That wiring covers alot of the engine and engine compartment and at the age of the truck, could easily be shorted out. It is very possible your fuse blowing has nothing to do with the blower motor or resistor itself.

I had a problem with my van popping the fuse years ago. It was a shorted diode on the ac clutch connector. I replaced the connector with a new one that included a new diode and never had the issue again.

1983 G20 Van, 350 TPI, Ported 906 Vortecs, Edelbrock 3817 Base, ASM oversize runners. Reed Custom Roller cam, 700r4, 12 bolt with 3.08 gears, Doug Thorley Tri-Y headers, true duals


Edited by 1983G20Van on 01-29-23 10:24 AM. Reason for edit: No reason given.

 
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