i can`t gety it apart. chrome cup off, i can`t pull the body of it off the lense. i`d like to replace the bulb before i put it in. any suggestions?

 

Probably find your answer here..............
http://www.google.com/search?q=Dixc...h+hookup&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

 

My old sun tach has 4 wires one being the light circuit which I wired to the grey dash bulb circuit on my 57. If you only have 3 wires to start with I guess the lamp would be on all the time as it would be connected internally to the power wire for the tach. You would have to take it apart and isolate the lamp if even possible to do so. Jim

 

It's been 40 years since I owned one, but I think the red wire is power for the light only, you can connect that wire to your instrument lights, and it will run off the green wire only. It's an easy enough experiment to try.