If one battery is weak, can I jump just that one?

[1 Patriot-of-many]

I'm unclear how the separation of 24V and 12 in these trucks works. Can I jump a weak battery with my 12V vehicle to get a M1009 started or do I need to use the 24V slave connector?

 

[ken]

you can jump it with a 12V wehicle. Just put your cables on the weak battery. But i have the best result when the charging vehicle is on the secondary battery.

 

[sandcobra164]

Make sure you don't let the jumper cables touch anything but the appropriate terminals on the battery itself or you may damage the slaving vehicles electrical system.

 

[1 Patriot-of-many]

Thanks guys.

 

[idM1028]

Yep. I have jumped the front (12V) battery many times doing this, but also the rear as well. If both are dead you can slave cable them or jump them using two vehicles.

 

[islandguydon]

IDM1028 is correct, the front battery is # 1 and will run the vehicle accessories. This is usually the weak one. I also jump just the 1st one to start if necessary. Works fine. Be careful the polarity is correct.