CM871 things to check after purchase?

[Rawze]

No one is trying to discredit your experience hedly, just were trying to understand why it would happen like that.

12v alternator sounds a bit low. It would make for lower than normal voltage in the dash etc. and they are supposed to have remote sensing at the batteries, yet most prostars do not have remote sensing wiring at the alternator. Most mechanics will simply install a jumper at the alternator to bypass it and call it a day instead of doing the right thing when putting one on. It could have been part of the problem, who knows. Sounds like maybe someone could have possibly robbed the original (much bigger and nicer) alternators off them before they were sold, 325's are worth a lot and can easily be sold used, or put on another truck that needs them. Used truck dealers will quite often swap alternators on trucks when people say they want to use an inverter on the truck they are buying. Who knows what used junk they might have been replaced with, or how old that junk was. could have even been the original purchaser of the trucks so that they could put those alternators on their other trucks that had smaller ones so their drivers could use Inverters. some fleets do order trucks with big alternators so drivers can install them.



Thank for the story and feedback, maybe others that might be having same issue can benefit from it too.

Waterloo is right too. Prostars are notorious for corroded exposed ground cables between the engine block and starter, and several other places. this can make for some nasty electrical noise going down the road too.

Also mine has remote sensing. It was for the origonal alternator, and I was told,.. and know for sure that you need remote sensing to run gel-cells properly. The whole fleet was toying with gel-cell batteries for a while, but they kept having bad luck with them so they abandoned the idea.


I forgot to mention also that I have a 30-farad HUGE external capacitor on my inverter and it filters a LOT of electrical noise out of my whole system, making it very stable. Maybe that is why my truck runs so well even when the voltage is low?