Starting/battery issue

[choll]

I am going nuts, short trip I know,my 1028 is having an sporatic starting issue. Here are the facts 2 new batteries, rebuilt alts,motor not running front battery 11.5 volts, rear battery 12.5 volts across both 24.4. Running front battery 14.8 rear 14.5 across both a little more than 28. Some mornings I go out to start the truck and it acts like the battery is dead. Starter just clicks. Lights are real low. Batteries still read the correct voltage. I hook up a jumper box to the front battery positive terminal and a body ground truck starts with no problem. Any ideas suggestions.

Chuck

 

[MVtrucker]

Could be a poor ground connection, possibly bypassed when jumpimg the batt.

 

[choll]

I already looked at that everything looks good, but it does make sense. The only ground I see is from the neg terminal of the batterycable to the body then going to the lower breaker bar on the fire wall.

 

[sprucemt]

Try an additional ground from the starter bolt to the batteries.

 

[mangus580]

I would have your front battery tested. Even new batteries can be bad.

 

[choll]

You must be a mind reader I just had them checked they were ok

 

[mangus580]

Ok.. but if you are measuring that low of a voltage on the front battery, you must have a draw then. Which is probably why sometimes they are dead when you come out.

 

[Michael]

11.5 is low for a fully charged battery. If it is good it must be discharging overnight.

 

[JohnFire]

I have had a draw on mine for a long time, and now think I figured out what the draw is. The ignition switch, since I can pull the key out no matter what the position, I apparently have been pulling it out with it in the acc position which left the system powered on.

 

[mangus580]

A CUCV 'stock' doesnt have an ACC position.....

 

[JohnFire]

It is where the stock ACC would be. Not everything powers on like the ACC would, but by accident I found that my wipers came back to life as I was taking the key out and was past the lock click(if this makes any sense). Habit I turn the key all the way back, and take it out which apparently is a little too far.