When my charger failed, the LEDs on the charger for the House battery bank did not light up. The side of the charger for the engine battery seemed to act normally. The charger plug is a different connection than a standard household 3-prong plug. You might look in the Four Winns Parts Catalog and click on the P/L 268V Wiring, then click on the camera icon for the battery charger:
http://parts.fwdealer.com/Catalog/Categ ... rettyPhotoThis plug is in the engine compartment in the port side forward corner. Yes it is a pain to get to. Sorry. You will need to clip a couple tie wraps to get it to where you can reach it. I believe I clipped the power wire from the old charger and spliced it to the power wire for the new charger. I suppose you could cut the cord for the old charger and add a female 3 prong receptacle, then somehow tie the plugs together so they do not com apart later.....
I installed a NOCO Genius II two bank charger. This charger delivers a total of 20 amps, 10 amps per bank (like the OEM), and does taper off when the battery is near full charge.