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Help Me Find a Relay

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Old Jul 30, 2007 | 01:38 PM
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Default Help Me Find a Relay

I'm looking for a relay for my power windows. I would like to use just one per side instead of two, but I can't find anyone local who knows enough for me to describe it to them.

What I'm looking for is a relay that uses two control wires to move the contact in tree different positions; power up, power down, and neutral. Does such an animal exist? A part number would be helpful
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Old Jul 30, 2007 | 03:29 PM
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Look at Newark electronics (do a Google). What you are describing is a double pole, double throw relay. The trick may be to find one that can handle the amperage of a P/W motor.
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Old Jul 30, 2007 | 05:36 PM
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Default Programmable Relay

http://www.thinkeasy.com/easy412.htm

Here is a 12V programmable relay. This has 8 inputs and 4 relay outputs. I 'think' it's around $100 and will do both sides. These work just like PLC's (Programmable Logic Controllers). I think the output relays are rated at 8 amps. If I'm understanding your electrical configuration correctly, this would be the I/O table:

Inputs
1) Drivers Side Switch Up
2) Drivers Side Switch Down
3) Passenger Side Switch Up
4) Passenger Side Switch Down
5) Not Used
6) Not Used
7) Not Used
8) Not Used

Outputs
1) Drivers Window Up
2) Drivers Window Down
3) Passenger Window Up
4) Passenger Window Down
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Old Jul 31, 2007 | 07:14 AM
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8 amps is not going to be enough for power windows. I would think 15-20.
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Old Jul 31, 2007 | 08:16 AM
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Advance Auto Parts has 30 amp fog light relays for about $5. $20 isnt bad.Enter your zip code.
http://www.partsamerica.com/productd...egoryCode=3443

Last edited by ...Roger...; Jul 31, 2007 at 08:24 AM.
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Old Jul 31, 2007 | 08:21 AM
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Yep, just use 2 for each side
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Old Jul 31, 2007 | 08:48 AM
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Originally Posted by DWncchs
Advance Auto Parts has 30 amp fog light relays for about $5. $20 isnt bad.Enter your zip code.
http://www.partsamerica.com/productd...egoryCode=3443
Ya, I'll just go with two per side. I was trying to avoid that, but it's going to be easier and cheaper that way.

Thanks guys!
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Old Jul 31, 2007 | 10:34 AM
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Read up on SPDT (Single Pole Double throw) relays here. These guys are good to do business with, and resonably priced.

http://www.rallylights.com/hella/Relays.asp
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Old Jul 31, 2007 | 10:57 AM
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Originally Posted by markdtn
8 amps is not going to be enough for power windows. I would think 15-20.
Wow...get out the welding cable! I don't have PW so a wasn't sure what the Amp draw was. The problem was trying to have 1 relay control dual inputs. This is the only way I know to do that.
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Old Jul 31, 2007 | 11:12 AM
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Originally Posted by 71rdster
Read up on SPDT (Single Pole Double throw) relays here. These guys are good to do business with, and resonably priced.

http://www.rallylights.com/hella/Relays.asp
Ya, I figured out an hour or so ago that a SPDT relay with an open neutral would work. I thought the SP part was the control wires not the power wire, but I'm on top of it now. NOw having problems finding a 30 amp base. I'm closer though! If nothing else at least I'm learning a lot.
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