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Old 02-17-2006, 12:40 PM
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Power seat wiring

I am installing 2000 Cadillac Deville power seats into my 55 F-100. I got these seats from a local scrap yard. I don't know how long they set out in the weather. When hooking them up to power, the passenger seat works just fine, but the drivers seat will not work. I traced the wiring to a box which seems to have a lot of relays in it. I do not get any power out of this box. The part number on this box is GM 25661913 and it has a UTA part number 601-0520-010. I would like to know if this is a standard box put in other GM vehicles, and if it is possible to bypass this box seeing as I don't need all the memory and heating features. Where should I go from here?

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Old 02-17-2006, 12:46 PM
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Sounds like it's the memory box. You should be bale to have power to the seat position buttons, then wire the buttons directly to the motors. That's how a non-memory seat is wired. Should be a standard GM part, but I can't say for sure. I'd suspect any Buick/Olds/Pontiac with memory seats would have the same box. You may be able to rob the switch and wiring harness from a non-memory seat and use that.
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Old 02-17-2006, 03:10 PM
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Doc here,

Farna is correct, That box is the Position memory box...

You Should be able to go to the seat motor, isolate power and ground wires, and harness that to a standard set of seat switches..

Go to the local auto zombie or Kragens "HELP" rack, you can pick up a set of switches for GM there..and be prepared for sticker shock! like $30 to $79 bucks.

I would use a master relay control system for the seats to better provide power to the motors and safety ... or individual DPDT relays for the seat motors, either is good. The latter will help make your switches last forever..

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Old 02-17-2006, 03:33 PM
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You can get the original wiring info from www.alldatadiy.com.

Each function of the seat requires a pair of relays to change the polarity of the motor for forward or reverse. If your lucky, the relays will have a "hard wired" (non-computer) connection from the control switches to the relays.

Another option, you could throw away the original control box and purchase heavy duty automotive style relays. Each function of the seat (motor) ,3 or more, will require a pair of relays.

See the attached sketch of a forward / reverse relay control for a DC motor.

Attached Files
File Type: pdf relay Rev-For DC motor.pdf (26.1 KB, 506 views)
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