77 Dodge 360 No Power To Starter?

[69DodgeCharger]

I am doing some light tune up work for my neighbor on his 77 Dodge van motorhome, (plugs, wires, cap, rotor, oil change) After doing all this everything was looking good until I shut it off to look underneath for leaks or anything out of the ordinary. I then tried to start it and nothing. No click, no nothing.I had started and stopped it about a half dozen times prior to this. The starter appears to be fairly new and all other accessories have good power to them it seems. I was wondering what happened to this thing. I need to get it figured out as I don't really want conflict with him or him thinking I messed something up. Anybody familiar with this type of problem and what it may be. Thanks In advance for any help.

[FLG]

Might be the cables. Try removing them and cleaning the contacts. If that dosnt work try jumping the starter relay. Finally if that has no effect, give the starter a whack and see if it works.

[UFO]

Another thing to try is put it neutral.

[FLG]

Yep, could be bad NSS switch, you can determine that by jumping the relay. Once you jump the relay if it starts to crank its either a bad relay or NSS switch, or possibly wire came loose from it..ect