Electric Seat Wiring Help

[efreeti]

David, thanks for the PM, tried to respond but your inbox is full.

Waiting to hear from donor car scrappers to see if they can supply looms. Will try Les if not.

Annoying thing is that there are connections for the heated seat switches behind the dash but no loom for the seats themselves. Grrr!!

Any diagrams you find would be useful. Can't find anything in Haynes, is there another source for diagrams?

[Greeners]

Originally Posted by efreeti

David, thanks for the PM, tried to respond but your inbox is full.

Nice to be popular........Trying to get the whole loom out is very tricky but possible.....

[Duotone]

Here are two diagrams and the plug connections.

Circled is plug 253 this is the black plug under the seat.[coming from the seats]

Pins 1 and 2 are for the heated seats..
Pins 4 5 and 8 are from the passenger fuse box..
Pin 3 is earth..
Pin 6 is K Bus connection
pin 7 is the one pin I am not sure of {perhaps raykay could help]

Looking at the drawings I woud say that you make a loom, you only need 8 wires..

Hope this helps

Dave T

[efreeti]

Duotone, you are a wonderful, wonderful man. That makes life so much easier.

Wonder if just ignoring the K bus will get them to work on the switches or if I need to get another switch. Maybe switches from maplin would work as a temporary measure.

So excuse my ignorance but where do these diagrams come from?

[Duotone]

Hi efreeti.

I think that you should try and connect up the K Bus. The K bus wire colour is White/Red/Yellow, it can be picked up from various places behind the dash. Linking into K Bus from your seats just might make your memory function work..

I'll pm you about the diagrams..

All the best

Dave T

[Bernard LPG]

Originally Posted by Duotone

Hi efreeti.

I think that you should try and connect up the K Bus. The K bus wire colour is White/Red/Yellow, it can be picked up from various places behind the dash. Linking into K Bus from your seats just might make your memory function work..

Dave T

I found that the memory seats worked without the bus connection. The only function missing was the automatic recognition of which door key is used, so selecting the relevant position. All the other intelligence appears to be in the black box fitted to the seat. It wasn't my car anyway!

[raykay]

Originally Posted by Duotone

Here are two diagrams and the plug connections.

Circled is plug 253 this is the black plug under the seat.[coming from the seats]

Pins 1 and 2 are for the heated seats..
Pins 4 5 and 8 are from the passenger fuse box..
Pin 3 is earth..
Pin 6 is K Bus connection
pin 7 is the one pin I am not sure of {perhaps raykay could help]

Looking at the drawings I woud say that you make a loom, you only need 8 wires..

Hope this helps

Dave T

Pin 7 is shown as the 'Logic Earth' connection for the ECU, and is connected to a different earth point to the other earth connections, which makes sense as it is good practice to keep logic and power circuits apart.

[Duotone]

Originally Posted by raykay

Pin 7 is shown as the 'Logic Earth' connection for the ECU, and is connected to a different earth point to the other earth connections, which makes sense as it is good practice to keep logic and power circuits apart.

Yes.. That makes sense Ray.. In the plug on my car it is a thin black wire.



Dave T

[efreeti]

Right then, passenger seat is in and working, just got to wire up the drivers side tomorrow! At least the wiring is there now so I can just run an extension to the other side.

Fingers crossed I can get it working without having to swap switches around!

Manged to give it a really good vac while the seat was out as well! Still smells a bit doggy though

[keith52]

Yery interested in how you get on , still not fitted mine yet just played around with the wiring