Starter will not turn over

Dija charge the new batteries ? They are normally 1/2 dead when you get them

I spent 3 decades DRAWING PICTURES of battery cables that had masking tape starting with A for the smallest wire.

Then digital cameras came along and I still took notes the number of wires to each individual battery post.

I have always thought that this was far better than the alternative.

You are faced with the alternative.

Be patient

Find out which circuit does not work before connecting the wires.

Common sense: A 10 gauge wire is inappropriate for a radio and a 16 gauge wire is ridiculous for say a high powered electric jack.

0.xx ohms is a direct connection which can be a dangerous short.

Go buy some alligator clips and a roll of 18 gauge wire and make a meter ground wire Extention. Mystery wires with no potential to the ground can be connected then take your meter or test lights and check the battery terminal on the ALTERNATOR. But make sure you are not confused and think the terminal to be dead while it's actually alive.

I've resolved so many of these issues it wasn't funny. One customer tried to screw me royally by asking me to help. I checked his refrigerator by smell and his alternator by continuity. Boy did he ever get red-faced profane when he knew the jig was up. This isn't the easiest way to make a living.

Did you turn the mechanical isolator Switch off when installing those new batteries?
It should be turned back on now.

Or is the Use and Store switch turned to off?

Have you tried to use the boost feature?

Just ideas!

IS anything or any lights coming on ? Forgive me for sounding over simplistic, but did you remove protective caps from new battery terminals ?

Thank you for your help, going do some like wolfe10 suggested

You can do the first eight checks with a handheld voltmeter yourself. Go buy a meter :)

Perhaps we are misreading: OP may have a 2005 coach with batteries he just replaced.

If so, either a wire was left off or a fuse was blown when installing the batteries.

What happens when you turn on the ignition? Allison shift pad illuminate? Other things that only work with ignition on such as dash HVAC fan work?

BTW, your Caterpillar C7 has an intake manifold heater, not glow plugs.

MarkTwain wrote:

midnightsadie wrote:
your batteries are 14teen years old????

Buy new batteries every 5 years, you are on borrowed time after that??

Sounds to me like the batteries are pooped.

midnightsadie wrote:
your batteries are 14teen years old????

Buy new batteries every 5 years, you are on borrowed time after that??

When was the last time you cleaned the battery terminals?