Ground Wire Issue

[DonBaja]

In a vain attempt to install HD TVs in my '95 Monaco Dynasty 36 I have encountered a problem with what appears to be a bad ground associated with the (12V) map lights. The hot side of the map lights supplies both the map lights and the antenna booster. They have separate ground wires though and the map lights only work as the coach is sitting now when I ground to the antenna booster ground. Is there a switch in the map lights ground circuit that disables these lights under certain conditions that I am unaware of? A friend told me to just use any available ground (like any port in a storm). What do you folks say?

[Diplomat Don]

DonBaja.....Not sure what you're asking, but Monaco switches a lot of it's lights via the ground, not the hot side. This may be causing your issue.

[DonBaja]

Diplomat Don:

You are right. I finally figured out that the map light ground wire was controlled by the headlight switch being turned counter clockwise. I only figured it out after reading some articles I found with this site's search function. Thanks to everyone.