What is this? - Chevelle Tech
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post #1 of 8 (permalink) Old Oct 20th, 19, 9:00 PM Thread Starter
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Chris
 
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Location: Calgary, Alberta, Canada
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What is this?

So I am replacing the heater core in the car. It’s been 10years with no heat so I am think I’ll hook it back up. But what the heck is this thing in the heater box? There are 3 wires and a plug for it.

Man those old brass heater cores are sure heavy compared to the aluminum one I got.
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post #2 of 8 (permalink) Old Oct 20th, 19, 9:17 PM
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Mark
 
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Re: What is this?

Blower motor resistor used to vary the speed output of the motor.
LeoP, 68-13427 and Hotwire like this.
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post #3 of 8 (permalink) Old Oct 20th, 19, 9:17 PM
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Ed
 
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Re: What is this?

Bower motor resister?

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post #4 of 8 (permalink) Old Oct 20th, 19, 11:06 PM Thread Starter
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Chris
 
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Re: What is this?

Quote:
Originally Posted by modern malibu View Post
Blower motor resistor used to vary the speed output of the motor.
so this would go inline for the single orange wire that goes to the blower motor.


These resistors, are they known for failure?

1968 Beaumont
502 big block
Stock looking, definitely not stock sounding
HP and ET not determined yet!
GoFast Beaumont is online now  
post #5 of 8 (permalink) Old Oct 21st, 19, 12:06 AM
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leo
 
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Re: What is this?

Yes, failure is a possibility, it's old!!

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post #6 of 8 (permalink) Old Oct 21st, 19, 1:00 AM
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Jon N.
 
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Re: What is this?

The orange wire feeds out of it. It connects to the fan speed switch to work as a resistor that gives you different the speeds. Minor difference in semantics, but in the end, it does control what comes out to feed the orange wire.

Jon N.

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post #7 of 8 (permalink) Old Oct 21st, 19, 12:14 PM
 
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Re: What is this?

pretty sure they are available in reproduction for under $20

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post #8 of 8 (permalink) Old Oct 21st, 19, 2:28 PM
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Jeff
 
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Re: What is this?

Definitely replace it, it's much harder when installed. The resistors are wire wound resistive coils. They heat up when current runs through them, reason they're mounted to the air box, it keeps air blowing over them to keep them from burning up.

Not sure if your box is the same as mine, my 64 has a narrow opening, I got a cheaper resistor, it was wide, touched metal and would short out blowing the fuse. Had to order the expensive setup that fit correctly.

*Jeff*

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