Wiring for electric seats

[B210bandit]

I'm installing electric seats in my car. I intend to run a dedicated 12v feed from the battery, with appropriate fuse. Will it be OK to run one 12v to one seat, and then run a wire from the 12v positive on that seat to the passenger seat? Or should I have two separate wires from the battery, with two fuses? I've seen both methods on the Internet and wondered if one was better practice than the other.

Thanks, all.

[Penelope Stopit]

B210bandit said:

I'm installing electric seats in my car. I intend to run a dedicated 12v feed from the battery, with appropriate fuse. Will it be OK to run one 12v to one seat, and then run a wire from the 12v positive on that seat to the passenger seat? Or should I have two separate wires from the battery, with two fuses? I've seen both methods on the Internet and wondered if one was better practice than the other.

Thanks, all.

Run 1 x positive wire with a safety fuse heavy enough to take the current consumption of 2 seats being operated at the same time from the battery to a relay (Terminal 30) with a high enough current rating for 2 seats being operated at the same time, the relay should be fitted inside the car
Now run two wires from the relay output contact (Terminal 87) to each seat switch, fuse these wires close to the relay with fuses heavy enough to take the current consumption of a single seat
Now decide if you want the seats to work with the ignition key in the AUX or IGNITION ON Position, once you've decided the key position you can wire the relay to click in and power the seat switches from that position through their seperate fuses that you have wired in

[B210bandit]

Thank you. In the model that has the seats as standard they can be adjusted whether or not the key is in the ignition, and I'm happy with that. Does that mean I can do away with the relays and simply wire to the battery for "full time" power?

[Penelope Stopit]

B210bandit said:

Thank you. In the model that has the seats as standard they can be adjusted whether or not the key is in the ignition, and I'm happy with that. Does that mean I can do away with the relays and simply wire to the battery for "full time" power?

Yes you can, fuse each seat seperately and still add a safety fuse at the battery or run 2 wires from the battery and fuse them both at the battery
The problems arise if a child plays about with the switches and gets injured or you are working inside around the seat area and get trapped by a seat mechanism that has started moving by itself for some reason