Well, then my fishin buddy is the only idiot of his type out there....Sure wish it was something as simple as that for ya. I'd do the obvious...check all connections, wires for exposed areas, etc. I'm sure you've done all that. Guarantee you about 90% it's something real simple. Think I'd STILL put a meter directly to the TM battery. Won't take but a minute and absolutely rules that out. Good luck Pard.