1967 S2a Dash Layout

[Papa Romeo]

Hello everyone,
7572
My Christmas break wouldn't be complete without a few LR projects!

I've attached a picture of my dash panel. I've looked at many diagrams and pictures but haven't found one exactly like this. I can't identify the function of the black knob on the left side. At first, I thought it was my dome light switch- but after replacing the old bulb, it still doesn't come on when I pull the knob out. Then, I thought it might activate the 12v accessory plug above it, but I've seen pictures on the web of the same accessory sockets with no knob.

Any thoughts before I pull the dash apart and start tracing wires?

Thanks,
PR

[Manny]

I have one exactly like that on my SIII dash, and it's for an electronic fuel pump.

[roverjohn]

My old 1965 IIA 88" had the same knob and it was to turn the lights on for the instrument cluster(s). The Rover seemed to be all original but I can't be for certain that someone did not rewire it. Good luck!!!

[Papa Romeo]

The knob on the right turns on the instrument lights. I had not considered an electronic fuel pump.

[leafsprung]

left knob is normally a station wagon feature or deluxe optioned interior - it should operate the dome lamp - In terms of correctness - your dash screws are incorrect and your indicator lamps are mixed up and the bezel around the ign/lighting switch should be painted instead of bare brass - looks nice though

[Papa Romeo]

Great- thanks! I probably won't get to swapping screws or painting bezels any time soon, but now at least I know to troubleshoot the dome light.

[I Leak Oil]

Looks clean that's for sure!
Your dome light issue is probably a ground issue. It's a very simple circuit though and is easy to trouble shoot.

[Revtor]

Wipers?