Darl,

I'm a little bit smarter now that I looked at the bus. Not much but a little.

Here's my recommendation. Make sure you have 12 and 24 volts in the coach. That is step one. There are a number of places to check such as the posts in the box in the rear and at several point in the front box. I suspect from your description of what you have and what you do not have working something is funky.

You need to verify those breakers are closed (the big ones on the side above the black master shut off switch.

Then check all the small breakers in the front and rear electric boxes. Several relate to the start and run circuits for 12 and 24 volt. Pushing the circuit breaker trip button and resetting is all I would do at this point.

Then using rear start see if it will start from there. When you hit the start button you should simultaneously hear R4 (the big relay or solenoid) and the starter on the bus. If not, test for power to R4, with the start button pushed, and check for a complete circuit between the two big posts to insure power is getting to the actual starter solenoid coil. If it is, follow Joe's post. If it is not check the relays for 12V and 24V run front and rear boxes. I think they are R53 and R54 in the rear.

It is just a question of finding where the electric from the batteries stops.