W124 Electric Seats question.

[Redbeard]

Hi Folks,

This is my first post to this forum and sorry it's a boring technical question.

i recently bought a MBTex faux leather interior for my 1992 250D from a gentleman on e-buy to replace the ragged fabric interior. The new seats are electric, came with the two wiring looms and the control switches fit the door panels.

The seat controls are of the non memory type.

Questions:

Where will i find the 12V DC supply which comes from the fuse box ?

Which earth posts should i use for the front seat wiring ?

Both seats work, but the drivers seat base controls are reversed - i.e. front and rear up is down, forwards is backwards &c. Does anybody have a wiring diagram for the seat/seat control connection ?

All the motors and switches work when installed and running from a bench power supply. The two +ve supply wires to each seat are red/yellow stripe and red/white stripe. Should one be constant supply and one switched on with ignition or should both be switched on with ignition ?

Thank you for your help,

Neil xx.

 

[mejermy]

These may be of some use. Just did this in my E300DT (second time - did it before in the E250DT). I'll send one more attached to the next post.

Fuses E and F supply the 12v. IIRC ground is just in front of the gear shift with many others. I have other pix, so if these don't make sense get back to me.

 

[mejermy]

The one I was going to add in this post due to too many attachments in the earlier one is not for power seats but for heated (which I also did). You may need to move the seats into convenient positions whilst out of the car by applying 12v and ground to the switches under the seats. That will give you a clue as to what does what, but I think the circuit diagrams say it all.

 

[Redbeard]

Thank you mejermy, those circuit diagrams will help a treat. Now i know what i'm looking for.

Cheers !