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#1 |
Registered User
Join Date: Dec 2004
Location: Donnelly, MN
Posts: 52
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Newly Installed heater motor not working
Along with my instrument panel outlined in the previous post, my used hearter fan also does't work. I checked the power and it has power which works with the switch as I expected it would. I also checked the ground for the fan and it appears fine.
My first conclusion was that the fan was junk. So I grabed another used fan and plugged it in and used a jumper wire to get a ground, it also doesn't work. Now I am starting to wonder if it is the fans or is it something else. I have one more used fan I can take off and try. Anyone have advice? Thanks Jason |
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#2 |
No,I DON'T have Tourett's
Join Date: Mar 2005
Location: Reno, NV
Posts: 556
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Mebbe the switch? I've had trouble with those.
__________________
'72 K5 CST 350/350 Daily Driver '69 GMC3500 Camper Special CST Flatbed 396/400 Upgraded to show truck '69 GMC 2500 L6292, 3spd beater |
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#3 |
No,I DON'T have Tourett's
Join Date: Mar 2005
Location: Reno, NV
Posts: 556
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or the relay?
__________________
'72 K5 CST 350/350 Daily Driver '69 GMC3500 Camper Special CST Flatbed 396/400 Upgraded to show truck '69 GMC 2500 L6292, 3spd beater |
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#4 |
Is a bullfrog waterproof?
Join Date: Nov 2000
Location: OLATHE, KANSAS
Posts: 1,130
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Trying hooking the fan directly to the battery and ground to see if it turns.
__________________
"It is better to remain silent and be thought a fool, than to open one's mouth and remove all doubt." Ben Franklin __________________ 1970 Chevy shortbed 2002 Harley Custom Chopper (Long sucker) 1998 K2500 5.7L 5-speed Longbed 1st two are My son's toys...they just live in my garage! 1997 GMC K1500 Suburban 1993 S-10 Blazer 4D (youngest son's daily driver) 2000 Dodge Ram 4WD Ext. Cab (5.9L) Wife is a late year 1951 |
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#5 |
Lovin' Life in Miss.!
Join Date: Mar 2004
Location: Puckett, Mississippi
Posts: 1,937
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You are checking for voltage at the fan connector? All mating surfaces of the grounding strap are clean?
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The truck... you hear that? No really, you did hear that?!!! |
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#6 |
Registered User
Join Date: Apr 2003
Location: Rice, Minnesota
Posts: 370
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Heater resistor thingy melted in half??
__________________
1970 Blazer CST Looking for NOS items for my CST restoration. |
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#7 |
Registered User
Join Date: Dec 2004
Location: Donnelly, MN
Posts: 52
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I tried directly to the battery
I tried connecting the fans directly to the battery. I appears only power is supplied via a wire and the housing of the fan serves as the ground. Is that true?
If so, maybe I have two junk fans. jason |
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#8 |
Senior Member
![]() Join Date: Mar 2001
Location: Cedar Park, TX
Posts: 686
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yes...sorta!
Power (+12V) is applied to the terminal on heater motor, But make sure you have the ground strap attached to one of the mounting bolts on the outer perimeter of the heater motor base....if that allows the motor to "work" correctly...start looking elsewhere for the problem....ie, switch, fuse, wiring, relay, heater resistor pack, etc...
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71 Chevy C-10 SWB Fleetside RamJet-350/4L60e & Compushift/3.73Posi See it at www.prismnet.com/~grzanich |
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#9 |
Lovin' Life in Miss.!
Join Date: Mar 2004
Location: Puckett, Mississippi
Posts: 1,937
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Yes, that is true. The heater motor is a "case" ground. That is why I asked if all mating surfaces of the grounding strap were clean.
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The truck... you hear that? No really, you did hear that?!!! |
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