Rogviler

Here's the guts (minus a tiny spring that I dropped and didn't feel like looking for):



As suspected, there's a diaphragm inside and mine was split around the edge. The screw I guess just adjusts how hard the diaphragm has to pull on the contacts before they'll activate the light. It's such a strange feature. Did people not know how to drive a manual back then or were they trying to make it seem fancy?

Anyway, with that tossed in the bin I should have one less vacuum leak and that's always a good thing.

-Rog

psparky

Rog, when I first took my car to the shop after sitting for several years he told me I had a huge vacuum leak which surprised me as it did not when I parked it. Anyway after fixing lots of things like bad injectors and a fuel distributor it all ran well again. Me thinks the huge vacuum leak was the upswitch and he tossed it early on in the repair and just forgot about it. I thought about disconnection it for years but never researched how it worked, glad its gone.

sparky