Thread: How to Bypass electric seats to have constant power?

Not sure what you mean by power on waiting?

If you want the seats to be able to move all the time there's an ignition controlled relay under each seat. If you bridge it's contacts out you should be able to control the seat no matter the position.

I'd suggest checking the idle current draw incase there's something in there that'll flatten your battery.

Yes you are right. I want the seats to be able to move all time without key in at ignition position. Here is my under seat fuses and there is another yellow relay. I know it is 5 pins standard relay with 4 pins activated 85 86 87 30. Do you mean if I put live 12V+ to pin 30 (output for load power) then the seats would be moveable at all time?

Originally Posted by admiralranga

Not sure what you mean by power on waiting?

If you want the seats to be able to move all the time there's an ignition controlled relay under each seat. If you bridge it's contacts out you should be able to control the seat no matter the position.

I'd suggest checking the idle current draw incase there's something in there that'll flatten your battery.

Above photo was from passenger seat withoutrelay, this is from driver seat with relay

Even easier, pin 30 is a constant feed with the seats stuff being connected to pin 87. If you make up a* short jumper with 2 male spade connectors and connect 30 to 87 with it you should now have seats that move all the time. Just bear in mind this is just from me looking at the circuit diagrams, I'd try it on mine but it's got manual seats.

*2 technically one for each seat relay.

You were right, now I found each seat has 1 yellow relay. However, there is no waiting plugs in my 03 Td5 Manual for the electric seats. You can see photo showing left and right seats brown plugs, in the donor car it has a loom with 2 brown plugs in the centre console position waiting for the electric seats but my car has none of them. Now my question is still open: which wire in the brown plug is? 2 big brown and black ones I assume they are Positive and Negative, and 2 small ones are controller wires for relay?

I can confirm that the big Black and Brown/Dark Green wires are main Negative and Positive wires for each seat. However other 2 small Oragne/Purple and Blue/Grey wires (controller wires I believe) still are unknown of polarity to me atm.

And if someone wants to know my underseat factory brown plug they are only 2 pins plugs available which is main power without controller wires, and I tested they do not have power when key in ignition position, seems they do not activate fuse and relay for this one before.

In an attempt to find out what is the controller wire, I check out regular pin 85 86 87 30 of the relay in the D2. At the 2 main areas of fuse and relay in my D2a, most of the relay has 85 pin to be Positive (funnily enough 1 of missing R8 relay in engine fuse box has 86 pin to be Positive but not 85). So I am assuming the seat yellow relay has 85 pin Positive and 86 pin Negative, can anyone joins me to verify this? I was looking everywhere on the net without any clue (If I have the donor car now it wouldn't be a trouble to verify this in 5 minutes , stupid me enough did not do this check before as I thought my car had same plug as I was reading from many others stated in their electric seats conversion for D2)