Thor Forums

[javelin]

Just back from a short camping trip. Large spark and overheating battery cables is NOT a good sign. Sometimes you get a spark from inverter capacitors charging up but that lasts for a few seconds (if inverter is equipped). Melting battery cables is an indication of high current draw and short circuit load somewhere. If you hooked up the two 6v batteries correctly (last corrected generic coach diagram) the batteries are in series with negative ground to chassis. It sounds to me like you have a shorted positive side load, or perhaps a loose +ve cable touching ground (or hooked up wrong) somewhere. I would suggest disconnecting shore and batteries and trace out your +ve battery cable termination side to see where it goes and what breakers it passes through. You might have to map out your DC coach connections in order to resolve this without a proper schematic. Also check resistance (no power on coach) from where the +ve battery terminal is supposed to terminate, to chassis ground with an ohmmeter and start searching for the short circuit......low resistance indicates a short somewhere. If you are not electrically inclined I would highly suggest hiring a mobile RV tech to help you. Unfortunately with no coach schematic it probably will be a chore to trace things, but it is essential to remove the short (and determine if there is any other electrical damage) before hooking up any power again. You could try using the generic DC voltage drawing and see if it is even close to your coach wiring.......1993 coach probably has quite different battery control systems. Sorry you have had this problem. Also not sure how you bought this coach, but did you start and drive it home and then decide on a battery replacement?