My seat connector only has 4 pairs of wires going to 4 seat adjust
motors. The orange and grey wires at the seat connector are going to
the seat back motor. The motor is good and I put power on these
contacts and moved the seat back position where I like it. At the back
of the driver's seat adjust switches there are 4 pairs of wires coming
from the adjust switches plus wires for power and ground to the
switches. All the other pairs have continuity to the same color wires
at the seat connector and for the last pair, the grey wire for the
seat back switch rings out also. Only the orange wire is open. I don't
think it goes to any heating because the wire only has power or ground
on it when the seat back adjust switch is pushed one way or the other.
All 4 pairs have no power unless a switch is pushed and when pushed a
pair has power and ground else ground and power depending on which way
the switch is pushed.
BTW, people could make their switches last a lot longer if they put 4
bidirectional surge suppressors across the 4 pairs of wires. This is
because when a motor is de-activated the motor's coil's magnetic field
collapses fast and this induces current in the wires making a high
voltage arc across the switch contacts each time it is de-activated. A
surge suppressor acts as an alternate path for the surge so no arc
occurs across the switch contacts.
other companies make this part also.
The same thing happens with the window motors and window switches.