I've only had my 87 HJ60 for a few months and am still working out the kinks from PO's and 24 years of abuse. The PO had put in some cheap reconditioned batteries with different sizes and the battery on the grounded side kept dieing after a few days. I bought 2 brand new batteries that properly fit the 12" trays and have 1000 CA each which seem to working fine after one month.
My issue is that one battery is charging more than the other grounded one. With the truck not running one battery tests at 12.75v while the grounded one is 12.25v. When running the non grounded battery is at like 14.25v while the other is about 13.25+/-v. My battery guy was worried the one battery was going to get cooked. The alternator seems to put out a steady 27.9v. Is this normal as I've read on here that some folks rotate batteries when doing an oil change?
thanks
My issue is that one battery is charging more than the other grounded one. With the truck not running one battery tests at 12.75v while the grounded one is 12.25v. When running the non grounded battery is at like 14.25v while the other is about 13.25+/-v. My battery guy was worried the one battery was going to get cooked. The alternator seems to put out a steady 27.9v. Is this normal as I've read on here that some folks rotate batteries when doing an oil change?
thanks