Tomb8764

Thanks for all the information Geoff and Paul.   

Thanks for the suggestion Geoff, but the maxwell esm is a bit rich for my blood.   Looks like a good system though. 

 I'm sure it will bite me in the butt later, but I'm probably just going to replace the one pair of batteries and see if it fixes my problem. 

Well I lightly beat on the SP switch with no luck.   So I went back through and checked all the batts again and found 1 of the 4 is junk, it won't hold above 4v and under a load is nothing.   So I'll be replacing a battery (maybe 2), if that fails I'll open up that SP switch for further exploration.    

hicrop10, that is something I haven't tried.   Maybe tomorrow I'll give it some taps and see how it goes.

Thanks 

Also replaced cables about a year ago

4 6s.   They all tested good.  Started up fine about a month ago.   

Hey everyone, so basically I can't get my '71 RL700L to start as of now.   It will not crank over, when I try you can hear the series parallel switch make a loud click.   Also not sure if it is connected or not, but I've also developed a short that won't allow me to turn off the lights.   Unfortunately but not surprising this truck has had lots of backyard wiring done, so I'm not sure how everything is connected.   Also the S/P switch isn't very old replaced it about a year or more ago.

Thanks

Tom

I just ordered a new s/p switch, pretty sure that is my charging problem(only half the batteries getting a charge).   Hopefully going to be able to start hauling soon, maybe even make some money! 

Anybody know anything about this emblem?    I did a quick look online and could really find anything.  AEC-automotive equipment company- custom built motor trucks.   This is on my '71 RL700L dumptruck.   

Ok, that was a lot of information to read through.   I will be checking all battery connections when my weekend roles in on Wednesday.    I will also check out that s/p switch that may be under the metal console in between the seats.   I will add in that this truck is not a push button start, it's got a regular key start which looks original .   Keep the ideas rolling in, I appreciate all the input!

Also I'm pretty sure the truck is positive ground.   I'll double check that information in the daylight tomorrow. 

Thanks for the input guys.   Batteries are all good, the 2 that dont seem to charge were new last summer.   I'll definitely check the crossover cables.  Honestly I'm not sure if the truck is 12v or 24v.   All the lights seem to be 12v.    I've got someplace to start, thanks!

Long story short, my truck charges fine on the right bank of batteries (2 6 volt).   But the left bank (2 6 volt) only maintains at 12 volts, never reads anything higher than that when running.  I do have to jump the left side from time to time to get started. Also a bonus, whenever you run any accessories, such as headlights or heater, you get a voltage drop on the left bank.   The right bank stays fine and always charges as it should.   Any thoughts?