First thing to suspect is the OVP. My 124 gave me fits with dead battery issues. Rain water got into the relay from the cracked rain gutter above the battery & cover for the OVP. R2'd the OVP & made a raincoat for it with a plastic sandwich bag & a twist tie. That ended the problem. The other issue is a fuse in an unpopulated holder. Check your fuse chart & if is suppoda be empty don't put on in there. Many years ago with mine, I installed a fuse in a holder that was not normally populated with the intent to carry another spare fuse. Big mistake. Be patient, you'll find it! Let us know how ya made out.

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Edgar