I have a 2002 34' Holiday Rambler Aluminascape TT and the
panel that checks the holding tank levels and battery level
stopped working and I haven't been able to figure out why
yet. (yes, I changed the fuse). I need to fix it but that
may not happen before next month when I'll be using the
trailer in deer season.

The tanks aren't really all that big of a deal but I need to
know the battery level so I know when to kick the generator
on to charge 'em up.

Anyone know of a decent add on battery monitor?

Also, I'm getting two 4d's and putting them in parallel so I
need two jumper wires to connect the batteries. Suggestions
of where to get 'em?