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Old 02-02-2020, 12:41 AM   #1
724wdcopper
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What goes here?

Electrical plug pointing at an empty hole in the heater core cover in the engine bay, what is supposed to be here? 1984 Chevy 3/4 ton 4x4
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Old 02-02-2020, 02:51 AM   #2
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Re: What goes here?

blower motor resistor....https://www.americanclassic.com/1973...SABEgJLy_D_BwE
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Old 02-02-2020, 02:23 PM   #3
724wdcopper
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Re: What goes here?

Awesome! Thanks!
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Old 02-02-2020, 03:08 PM   #4
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Re: What goes here?

Mongocanfly, can you explain a little more?

If the resistor is missing, do you only have high speed on the blower?

Is this literally just wiring a resistor in series with the motor to slow it down? Seems a little crude, but I guess it's cheaper than building multiple windings into that motor.
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Old 02-02-2020, 03:33 PM   #5
Bigdually
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Re: What goes here?

Quote:
Originally Posted by kipps View Post
Mongocanfly, can you explain a little more?

If the resistor is missing, do you only have high speed on the blower?

Is this literally just wiring a resistor in series with the motor to slow it down? Seems a little crude, but I guess it's cheaper than building multiple windings into that motor.
Typically yes, only high speed will work without the resistor because high on the switch is just sending full power to the motor. The lower settings have resistance in line for the lower speeds. It's in the cool air ducting to keep the resistor from overheating. Same principle used yet today on a lot of vehicles.
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Last edited by Bigdually; 02-02-2020 at 04:13 PM.
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Old 02-02-2020, 05:19 PM   #6
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Re: What goes here?

Big d got it covered kipps...one speed only
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1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
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