blower motor capacitor

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Old February 4th, 2012, 12:28 PM
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blower motor capacitor

Anyone have a spare blower motor capacitor for a 70 442? I noticed I don't have one on mine. I see it in the manual. Do I need one?
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Old February 4th, 2012, 12:46 PM
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They are needed to surpress noise on AM radios, as the motors are brush-type.
Not sure if it helped on FM much. Since that area is hard to access, i say add one just to be safe.
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Old February 4th, 2012, 03:25 PM
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That's what I figured. I want to do everything I can (within reason) before I put the liner back in. I just have to find one. Do they sell them repro?
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Old February 4th, 2012, 03:41 PM
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You should be able to use any anti-noise capacitor - there is one on the regulator, and they are in a few other places, too, but I can't recall where - the '71-'75 B-bodies had one under the steering column.

You can connect it anywhere in that purple hot wire - it doesn't have to be connected at the motor.

- Eric
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Old February 4th, 2012, 04:24 PM
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But the caps are more efficient located closer to the source of the noise. Wont help much at the relay, so get it in by the motor.
Have a junk yard where you can look around at various cars to find one?

Anyone know what the capacitance value is? I once hear something like 0.1uF so if we find the value, you could use a cheapie from an electronics store if looks arent important.
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Old February 4th, 2012, 05:58 PM
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Not many older cars in the junk yards around here.
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Old February 6th, 2012, 01:10 PM
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Originally Posted by 69'442
That's what I figured. I want to do everything I can (within reason) before I put the liner back in. I just have to find one. Do they sell them repro?
I just bougt one on ebay - here's a link to see what it looks like. This capacitor is unique in that special boot connector that goes on the blower motor connection. The only other place I've seen a similar connector used is on either the temperature or oil pressure sender (I cant remember which offhand) on cars without gauges.

Last edited by costpenn; February 6th, 2012 at 02:18 PM.
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Old February 9th, 2012, 10:11 AM
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Got a capacitor from oldspackrat. Good guy and he has lot of good parts.
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