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I believe the positive of the 24v alt goes to the positive of the 24v batt. And the ground of the alt is isolated.

just reporting back that I found the short which ended up being the cable running from the power cable running from the starter to the 24v driver side battery. Pitman arm rubbed thru it.

I’ll look into the starter, I’m waiting on a power probe ECT3000 to get here in the mail. Seems like this truck will be the perfect test for it. truck has 28k on the odometer but only the good lord knows what it’s been thru in life. I was thinking I connected the batteries in the wrong sequence...

Yes the positive coming up from the 3rd frame mounted battery was taped up and insulated. Also the slave start cables were previously disconnected and taped up. I’m not sure who did it for him. I’ve disconnected the 12 and 24v alternator and disconnected the power going to the glow plug module...

Hi, new to the forum looking for help.. I recently inherited my dads 06 lssv, electrical gremlins everywhere. he’s always had an issue with the truck going crazy when hitting a good bump. all the dash lights will come on and the abs light will stay on. After he passed recently I started to...