Greetings all!

I'm working on a '66 1800 that's in somewhat of a shambles electrically.

The Overdrive system was all screwed up electrically, so I'm installing the relay system out of a '81-'84 240 (which has the self cancelling relay.)

I built a system like this for the Overdrive on my 122 with out any issues a few years ago, and have duplicated the wiring harness needed and hooked it all up.

Here's the issue I'm running into now: The OD switch no longer grounds where it connects. I checked it with a meter, and sure enough, there is no continuity between the bracket that houses the switch and a known good ground (bare metal).

Any ideas? I haven't dug deep enough into an 1800 dash before to know what might cause this. How is the bracket supposed to ground? Might this grounding issue prevent the turn signal switch from working as well? The only changes I've made to the car have been disconnecting the old OD wiring.

Also, as an aside, why did the in-dash OD light have 2 wires coming off of it? 1 of those wires is obviously 12V+, but what does the other wire do?

Thanks as always.
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