TR56210
Poster
Posts: 92
Reg: 10-28-18
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02-05-23 01:14 PM - Post#2854156
Reached the point in my build of 56 sedan, where I am installing power bucket seats ( from a 2 dr Lincoln Mark ). In testing seat functions by direct connect to battery, prompted a couple of questions.
I have available fused power key on or key off from my fuse panel.
Which would you use?
I assume, because I am not looking at the car, that fused pwr will be one wire and capable of supporting both seats. Right?
Ground wire. If my one wire assumption is valid, do I ground the seats to floor or do I need to run ground to battery?
Appreciate the groups input.
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55MAS
Senior Member
Posts: 1647
Loc: North Coast, USA
Reg: 12-19-01
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02-06-23 08:49 AM - Post#2854185
In response to TR56210
Reached the point in my build of 56 sedan, where I am installing power bucket seats ( from a 2 dr Lincoln Mark ). In testing seat functions by direct connect to battery, prompted a couple of questions.
I have available fused power key on or key off from my fuse panel.
Which would you use?
I assume, because I am not looking at the car, that fused pwr will be one wire and capable of supporting both seats. Right?
Ground wire. If my one wire assumption is valid, do I ground the seats to floor or do I need to run ground to battery?
Appreciate the groups input.
Most power seats are supplied from key off (enables seat adjustment before starting car).
If power is supplied to two seats then both are powered. Bolting the seat to the floor grounds them, assuming that you have a braded cable connecting the body to the frame & battery. A good body ground as above is needed for the higher power of the seats compared to lower power items like heaters, lights ect.
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Tony1963
Frequent Contributor
Posts: 2074
Loc: Orlando Florida
Reg: 07-09-18
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02-06-23 01:35 PM - Post#2854191
In response to TR56210
First, make sure that the circuit that you are using can handle the amps of the power seat motors. I would add a circuit breaker or separate fuse to that circuit as well.
As far as the grounds, I'd imagine that the ground is through the wiring harness to some body ground somewhere. I doubt that the seat in the Lincoln was grounded to the body so you will have to examine the inbound wiring harness to the Lincoln seat to see how Ford engineered that circuit.
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TR56210
Poster
Posts: 92
Reg: 10-28-18
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02-06-23 07:21 PM - Post#2854203
In response to Tony1963
Thanks guys can add body ground from battery.
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 4dr 57
"10th Year" Silver Supporting Member
Posts: 4798
Loc: Texas Hill Country
Reg: 11-10-04
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02-12-23 08:54 AM - Post#2854406
In response to TR56210
If wanted, you could add another complete battery based circut through a block of relays for more than just the seats that will make a regulatable system in all directions, using simply bigger wire, not battery specific cables.
Ground your battery to the transmission housing for things engine related.
I put a seperate neg. cable from the belhousing to the body (by the steering column I think) but that's just me probably.
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