On a recent trip the gas (only) hot water heater on my 98 Bounder quit working. I checked voltages on the wires in the hot water heater panel. What I found was a jumper diode, that seems as if it was an add on or recall type installation. I removed it and the hot water heater works fine. What I'm wondering is, if some of you full timers or smart persons know about this diode and if its necessary. I'm assuming it is if somone put it there. I checked it with a ohm meter and its open both ways. I'm wondering if a diode at radio shack will work????