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Tool Talk Discussion Forum

wiring switch

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Bill in NorthCe

02-24-2008 11:38:37

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I need to understand a wiring issue. I have a power window motor, whose gear is engaged in another gear (starter flywheel from a small block Chevy). I need to switch the motor to spin both directions. If I hook it up to a battery, I can get the motor to spin both ways by reversing the wires. What type of switch do I need, and what wires go where? The electric motor has two wires coming from it.

Thanks in advance. This one has me stumped.

Bill

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Brian G. NY

02-25-2008 17:15:14

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Re: wiring switch in reply to Bill in NorthCentral, 02-24-2008 11:38:37

Don't mean to be a wise guy but there's a gazillion power window switches out there in the wrecking yards. Just a matter of devising a mounting for it.

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dave guest

02-24-2008 17:27:12

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Re: wiring switch in reply to Bill in NorthCentral, 02-24-2008 11:38:37

Double pole, double throw.

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Kentb of SWMO

02-24-2008 13:30:52

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Re: wiring switch in reply to Bill in NorthCentral, 02-24-2008 11:38:37

DPDT, Double Pole Double Throw Center OFF Kent

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Gene-AL

02-24-2008 12:29:56

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Re: wiring switch in reply to Bill in NorthCentral, 02-24-2008 11:38:37

You need a 3-position toggle switch, with 'Off' in the center (6-terminals). Wire the opposite corner terminals together with two different wires like an X. Connect the 2-battery wires, one to each of the two center switch terminals, and the two motor wires one to each of a pair of terminals on one end of the switch (either end). 1 2 3 O O O O O O 4 5 6

Jumper a wire from 1 to 6, another from 3 to 4.
Connect motor to 1 & 4 (or 3 & 6).
Connect battery to 2 & 5.

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tech4

02-24-2008 11:56:04

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Re: wiring switch in reply to Bill in NorthCentral, 02-24-2008 11:38:37

You need a double pole double throw switch and if you want off with a center off position.
Wire the motor to the two center common terminals and the battery or power supply to each pole but reverse terminals on the opposite end. similar to the diagram

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Pete in MD

02-24-2008 19:34:54

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Re: wiring switch in reply to tech4, 02-24-2008 11:56:04

Tech,
Wouldn't a NC set of contacts cause a meltdown?
Pete

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tech4

02-24-2008 19:57:02

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Re: wiring switch in reply to Pete in MD, 02-24-2008 19:34:54

That is a diagram I found and why I said similar. I said a double pole double throw with center off. That switch in the diagram is a special slide switch that has a spring load back to the contacts on the left. I doubt that he will find that switch very common as it is used for another purpose but the wiring will be correct if he gets a DPDT Center off toggle or non spring load slide switch that will handle 10 amps. That diagram is for the ease of showing the wiring which will be correct..

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Bob

02-24-2008 12:01:31

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Re: wiring switch in reply to tech4, 02-24-2008 11:56:04

GOOD JOB, Tech! A MUCH NEATER diagram than the one I was going to post!

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Bill in NorthCentral

02-24-2008 12:00:55

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Re: wiring switch in reply to tech4, 02-24-2008 11:56:04

Thanks to you both. I really appreciate the help. I'll pick-up one of those switches and give it a shot.

Bill

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Bob

02-24-2008 12:04:37

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Re: wiring switch in reply to Bill in NorthCentral, 02-24-2008 12:00:55

Be SURE the switch's DC Amps rating is adequate for the load it will be powering.

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Bill in NorthCentral

02-24-2008 11:53:13

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Re: wiring switch in reply to Bill in NorthCentral, 02-24-2008 11:38:37

SPDT - single pole, double throw?

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Buzzman72

02-24-2008 11:50:10

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Re: wiring switch in reply to Bill in NorthCentral, 02-24-2008 11:38:37

IF I understand correctly what you're asking, here's what I suggest: Use a SPDT toggle switch [ON-OFF-ON], with the ground being run to the case/mount of the motor. Then connect each wire from the motor to opposite sides of the switch...and you should be in business.

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