Interior Discussion about interior restoration, repairs, and modifications.

manual to power seats

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Old Jan 1, 2010 | 08:48 PM
  #1  
logden12's Avatar
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From: San Diego, Ca
Car: 91 Firebird
Engine: 305 TBI
Transmission: AUTO
manual to power seats

Does anyone know if it is possible to install a power seat on to a no power seat car? Like is there a harness down there that is not connected to anything or do I need to find a harness? Where would I hook the harness up if that's what I need to do? Thanks.
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Old Jan 1, 2010 | 09:27 PM
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84 1LE's Avatar
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From: Oyth
Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: manual to power seats

No harness, you'll need that from the donor car.Or you can just make your own.Its bascially two wires, pos/neg.Most of the harness is on the seat track.
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Old Jan 1, 2010 | 10:08 PM
  #3  
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Car: 91 Firebird
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Re: manual to power seats

Ok thanks. So if I do get the harness from the doner car, where does the harness plug in to my car at?
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Old Jan 1, 2010 | 11:28 PM
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From: Oyth
Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: manual to power seats

Just ground the black wire anywhere on the chassis.The red can go to a fuse on the fuse block or straight to the batt (w/fuse).
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Old Jan 2, 2010 | 02:53 PM
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: manual to power seats

Yep - no need for a harness - just tap into the fuse box with a + wire, inline fuse holder, straight to the seat, and a ground wire from seat to anywhere.
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Old Jan 2, 2010 | 03:35 PM
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Re: manual to power seats

Most of the factory harnesses I've seen tap into the power lock harness under the drivers side kick panel. Any sufficiently large (12 ga or better) orange wire would work. There are a ton of them on the back side of the fuse block. Or you can just crimp a spade terminal onto your power wire and plug it into any of the open spots on the fuse block marked ACC or BAT.
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Old Jan 2, 2010 | 05:08 PM
  #7  
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: manual to power seats

I chose a BATT terminal in my fuse box for mine - that way I can adjust the seat with the key out (like BEFORE I get in).
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Old Jan 2, 2010 | 05:25 PM
  #8  
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From: San Diego, Ca
Car: 91 Firebird
Engine: 305 TBI
Transmission: AUTO
Re: manual to power seats

Great guys thanks! Now I just need to find a good set of fourth gen seats.
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Old May 19, 2010 | 11:01 PM
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From: San Jose, CA
Car: 1988 Firebird
Engine: 2.8 V6
Transmission: 5-Speed
Re: manual to power seats

Originally Posted by camaronewbie
I chose a BATT terminal in my fuse box for mine - that way I can adjust the seat with the key out (like BEFORE I get in).
When choosing this BATT terminal, did you have to upgrade the CTSY fuse from 20A to 50A and then add a fuse to the power seat of about 30A (for added safety of the seat motors)? The wiring diagrams I see for the BATT terminal are after the CTSY fuse (if you remove CTSY fuse, BATT terminals are also 'dead').

I measured current draw of my 4th gen seats to be about 22A or so when sitting on them. So, 22A+20A (standard rating of CTSY fuse) = 50A fuse. Then, to protect the seat motors themselves, add another 30A fuse between them and the BATT terminal.

This is what I think I need to do. Any thoughts?

I've attached a picture of the harness I just made. Uses AC Delco PT1157 to plug into harness already on seat. Uses GM fusebox tap (http://www.repairconnector.com/produ...Always-On.html).

I've excluded the extra fuse for now. I'll rely on CTSY fuse to do the job.
Attached Thumbnails manual to power seats-wiring.jpg   manual to power seats-gm-fuse-block-tap.jpg   manual to power seats-harness.jpg  

Last edited by malaka; May 20, 2010 at 05:49 PM. Reason: Updated
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