So I have a problem.? I drove my '77 sparky citicar the other day.? All was well.? Today I went out turned the key to on and heard a click in the trunk like I normally do.? Hit the gas and nothing.? I have a load tester and check my 4 12v batteries and all are fully charged.? My fuse 5 on the fusebox is all good, but no joy.? The two towers in the trunk look pretty rusty.? suggestions?