No crank no start

[andrewflywhl@yahoo.com]

Hello all. Have a 1980 MCI and it was a great runner. After I changed oil and filter and air filter it won't crank now. Have power to starter relay but nothing past it so no signal to starter solenoid. Any tips on what to look for? Thanks in advance.

[Coach_and_Crown_Guy]

Did someone, whoever changed the oil, hit the mechanic's safety switch?? You can disable the starter in order to work on the engine and not get caught if someone sits up front and tries to start it. It's on the panel in the rear engine compt. where the light switch and front-rear-run/start switches are located.
If it's not that....good luck I'm out of ideas. Except maybe the transmission may not be in neutral, either manual or automatic, that won't let it crank either. It's usually the simple things. I'm assuming it was working before so you already know about any of the sneaky anti-theft tricks Greyhound added to discourage unauthorized joy rides, usually a panel switch like the stair well light or reading light switch had to be on before it would start, but you'd know this already, Right? Look for simple first.

[Dave5Cs]

Yep sounds like someone left the switch in the rear start box on rear start. flip it to front start. Then go up and try to start it from the driver switch.
Also in the driver side electric box there is two ice cube relays. One is the start relay . Now go up front to the side electrical panel open it and switch the heater ice cube relay with the one one in back and see if that fixes it. They just pull out and push in. You can buy those at a major electrical supply house like Platt etc.