The starter doesn't engage when I try to start the engine. I tried hot wiring the switch but nothing happens. I re cleaned the battery posts. I then shorted the solenoid with the key on to start it. The engine started. I took the starter to Auto zone to have it tested. I thought the solenoid might be bad. They say the starter is good. The starter is back in. Does anyone have an ignition wiring diagram? Or an Idea where to check? It has the 1.6 litre industrial Ford engine.