Redrange,
I don't know but I can maybe help you find out. Firstly, I'd be pretty suprised if it was a switched earth but then this is a relativly quirky Britsh car, most of my experience is with Jap cars.
If you've got a multi meter you can find out though. Take the bulb out and test the bulb terminals with the car in the condition in which the bulb will be off (ie lights off, doors shut, whatever).
The difference between a switched live or earth can be established thus. With a switched live one terminal will make a circuit with the body, the other won't make a circuit with the +ve battery terminal (assuming the car is a -ve earth, most are).
With a switched earth one terminal will make a circuit with the +ve terminal and the other won't make a circuit with the body.
Best to test this using a multi meter with a fuse built in and make sure the vehicle is in the light off mode or you'll get confusing results.
Oh where have the simple days gone ?
Hi Red,
According to my 95 wiring diagram,
Fuse F1 10a supplies the rear footwell lights B182 directly via lead PU c625 to c613.
The negative side is driven negative by the BECM PW wire pin 12 (C625) z238
Pins 4 and 13 of BECM z238 are taken to ground by door switches C714l and c714r via ground distribution points e367 and e328
In a nutshell the lamps are supplied diectly form fuse 1 but the negative is controlled by a semicondctor switch within the BECM being taken to ground by a door switch.
Rave page H4-5 and H5-3
Fronts will be similar
Hope this helps
Fred
What are you doing with the circuit Red?
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