Postby saabfast » 06 Oct 2019 20:25
Going by the manual, there is only a passenger seat switch but a seat belt switch in both the driver and passenger units. It looks as if the seat pad switch is NO and made when sat in and the seat belt switches (in the receiving part) are NC to earth and opened by insertion of the belt. The light is on the common feed to the seat pad and belt switches.
The manual is downloadable from the Documents section of the TRDC Facebook page if you do not have it.
Alan
Saab 9-5 2.3t Vector Auto Estate Stage 1
Saab 9-3 2.0 SE Turbo Convertible
'81 TR7 DHC