I want to add a power driver seat to my 98 S70. I found a set of mint 850 seats that bolt in with a slight mod to the seatbelt hardware. The strange part is that on the driverside there is only one plug for the heated seat, but on the passenger side, there is a plug for the heat and then another harness that could plug right in to the power seat control on the driver side. My car had manual seats from new. I did extend and reroute the power harness to the driver side but the seat still does not work. I searched the site and found some mention of additional relays to drive the power seats? Anyone have any ideas. Thanks.....................................

 

Check under the carpet the other plug might be there.
There is an overload relay in the fuse panel under the hood it is silver.(Metal housing)

 

I"l take a look for the plug. Do I have to add that relay? On the relay box under the hood, the normal access pannel exposes the standard fuses (I think 1-36). If you unscrew the four screws on the cover pannel and remove it, it exposes i believe four more slots for fuses or relays (37-40). Slot 37 has a silver fuse or relay already in it. Any Ideas? Thanks

 

I think you can see then through the normal access it would be just above the #1 fuse.

 

Ok i figured it out. Below the two standard rows of fuses numbered 1-36 there are 4 slots of the larger fuses (fuseable link, relay, im not shure what it is) labeled 37-40. 37 is being used and the fuse (silver like you mentioned) is labeled 12v 20amp. I pulled it out and tried it in the other slots and when I pluger it in slot 40 the seat worked! Thanks again!

 

Your welcome glad it all works fine now.