airbil

Sorry to bother, but I have looked under the dash and a quick look under driver seat, but I don’t see the relay.
Maybe it’s in the box attached underneath the seat?
I think I’ve spent a number of internet hours looking for the answer to no avail, so any help would be very much appreciated.

thesteve

I did a quick dive and came up with the following:
left and right control units under the seats:




Also, left and right relays located in left and right "Relay Supports 1&2" below the dash







Further description of Relay Supports here:
https://rennlist.com/forums/cayenne-...ned-off-2.html

Happy troubleshooting.

thesteve

Correction. Looks like only one seat heater relay, located in relay support 1.

airbil

Thanks for digging this out. All in all, I have to believe that there is a seat heater controller and maybe a relay… somewhere under the seat.
i have pulled down the panel under dash and there was nothing there that looked like a seat heater relay.

thesteve

Two controllers, left and right, under their respective seats. One relay under the left dash. Hidden.
Did you watch the video? I think the guy shows how some relays are hidden on the underside of a bracket.

thesteve

I think this "terminal 75 relay" is not just for the seat heaters. Probably not worth looking for it.
Here is the schematic for the LHS.
Attached pdf.