Last year the white 300C conv suffered an electrical and engine melt down returning from Carlisle. Got engine back to snuff, but left electrics to "future" tinkering. Decided today to lower roof and windows by by-passing system, so car could be used in parade tomorrow. (Problem is only in feeder line for power acessories.) Disconnected feed wire to roof switch; added jumper to positive: Viola! ...down goes roof. Next, removed drivers dor panel, unplugged feed block to window switch: Viola!...down go windows. Then, for the heck of it, I tap jumper to positive switch lead---expecting a spark of short like received at body feed end. NO! The right rear window goes UP! I lower it again, walk to front of car, and tap body feed to starter relay block....UP GOES RR window!! In full up position, tapping body feed yoields one angry spark, that which lead me to believe malady was a short! Under the dash is a mess of fried wires; my question is could the problem have been the window switch "sticking", the circuit over-loading enough to draw melting temperatures under dash and no where else? The window was in full UP position when system went down. OR: Could the window connection be RESULT of meltdown? Do the window wires pass up THROUGH dash area loom? '57's don't have fuses; circuit breaker on window might have just pulsed the current!! L.A. Jugle, Elmhurst, IL