Batboard

I am having problems with older and new CM300's not transmitting and beeping if supply voltage is not 13.8 volts. Sometimes if I am driving very slow, I must turn off the air conditioner to transmitt. Is there a fix for this?

run the "HOT" lead directly to your Batt.Make sure all the Batt.are CLEAN !Also use a good solid ground

I always install that way.