Engine won't start, did the wiring harness disabled my bus?
So I've been slowly skinning the inside of my bus and started on the ceiling work. I disconnected some wiring harnesses, as well as all the lighting, emergency exits, etc. I also removed the heat exchangers.
At one point I realized that the engine wouldn't even turn over. I reconnected some wires towards the emergency exit and it would turn over again, though I never tried to actually start it.
Unfortunately, now, all it will do is turn over, it won't start. I am wondering if there is anything relating to having all the wiring harnesses properly connected that is preventing it from starting properly. I know the interlock will prevent the ignition from firing, but my ignition is firing fine.
The bus has always started fine, the last time I drove it was probably two weeks ago, and it is always fired right up. The only deltas between then and now are the removal of the heat exchangers and the disconnection (and possible improper reconnection of the wiring harnesses to the emergency exits, windows, lighting, fan, and rear door.
The battery is fine, the bus has gas, it turns over, it's 70 degrees outside. I'm kind of lost as to whether this may be a larger issue, and unfortunately I am new to the diesel mechanic thing. I am exploring whether it is a fuel/pump issue right now, I've been priming it, but I haven't been bleeding it, going to try that next but if this is some random wiring thing, I may be spinning my wheels for a while, Any ideas?