My husband replaced a 1996 s10 2.2 engine with a 1995 s10 2.2 engine. We are having some aggravating troubles. He has checked all conections, and the battery. We have no interior lights, no gauges, no head or tail lights, it will not turn over using the switch. It's like it's dead. It will however turn over and over, but will not start, when you short out the starter. We have checked millions of times for pinched wires, broken, lose or what have you. Does anyone have any suggestions on what to try now. We're about ready to set fire to it. Note, then 1995 engine we replaced the 1996 ran great before we put it in. Also, the 1996 ran as well, but knocked, that's why we replaced it, so we know at the time, before we changed the motors both ran.
Please help.