Hello, need some help here. Working on a 1971 DT1 and it has some headlight circuit issues as some of the wiring got hot some how. This is a recent purchase from Bring a Trailer. After looking at the main switch/ignition switch it appears that the second position will turn on the tail light and instrument lights but the head light circuit doesn't appear to be energised. I need a clear wikring diagram to assist me. Does the engine have to be running to energise the head light circuit or do I have other promblems with the wiring circuit to head light?