Can you fit electric seats into non electric car?

[Ian mallett]

Originally Posted by scutyde

Power seats are only partialy pre wired in 850 and S/V70 .
The wiring ends under the dash at the big mega connectors.

You need 2 wires which go from under the seat to the front connectors (one for permanent supply, the second for diagnose which is optional btw). The last cable goes behind the seat under the rear seats to a collective ground point located under the carpet.

You also need per seat a circuit breaker (the big silver fuse looking thing) which go in position 39 for the drivers seat and 40 for passenger: You need to take off the lid over the fuse compartment (4x Torx 25) to gain access to them.

The pins in the seat connector are called Standard Power Timer and you need the female ones. The ones in the mega conenctors are still sold by Volvo. The insulator for the connector under the seat is no longer sold by Volvo however every 850 and V70 has one in the trunk it is the one where the antenna booster is connected.

This is a long shot I know as it an old post but could you tell me where the cables for power seats connect behind the dash? I have electric donor seats and I got a few feet of loom and the breaker for each side but I'd like to connect them to their "proper" power supply through the fuse box rather than just a battery live.

[scutyde]

Which modellyear is your car and the donor car?
You will also need the circuit breakers (fuses).

Cristian

[Ian mallett]

Donor car was 97 or 98, mine is 98. I have put the breakers in the fusebox & found the 2 power cables going through the yellow mega connector, I have also found the live spare pin in the red mega connector to go to the sill harness. I haven't looked in passenger footwell yet.
Earth's are straightforward. What's thrown me tho is both looms from donor car have 4 wires. Live, earth, ign switch live & diag. I've tested both seats from battery & drivers one (with memory) works with just live & earth connected. So ign live is redundant?
Passenger side however (non memory) needed the ignition live powering too.
Am I correct in guessing the wiring is set up to accommodate all combinations of electric memory & non memory LHD & rhd?
This would explain the redundant ignition live on driver's seat & the redundant diag cable in passenger seat.

So really the only bit I havnt worked out yet is the connection in the red mega connector for the diag & ignition and then the passenger side ones.
I've ordered the terminal pins from Volvo to make it a 'proper job'

Bloody comfy these r seats 😀😀