billdorn
Member
- Sep 24, 2010
- 42
- Boat Info
- 2003 Amberjack 290 5.0 260HP B3
formerly 1996 240DA Sundancer 5.7 210HP
- Engines
- 5.0 MPI 250 HP/ Bravo 3
I need some ideas on how to diagnose an electrical problem that just started. when running on bank 1 the alternator wont go above 12.5 volts or so according to dash. but when i switch to 2nd bank it runs at 14v. So i think i can eliminate the alternator as the problem.
I have 2 banks on a perko battery switch.
bank 1 has 2 batteries.
it is dedicated to the "house", which seems to be just the fridge as far as i can tell.
it also has a xantrex monitor hooked to it and it shows 12V and LOW, even with engine running.
if i measure the battery voltage right now sitting in the drive way of each battery it shows 13.7 volts??? but the boat gauge and the xantrex both show 12 volts? so 2 seperate gauges reading the same thing on bank 1.
bank 2 is is a single battery. it does have a bass tube directly wired too it.
measures 13.7 V with a meter right now in the driveway and also looked fine while running at around 14V.
I have a blue sea ACR that combines the banks and i can see the gauge drop from 14V to 12.5-13V whenever the 2 banks combine.
what should I test next?? Batteries are all mfg 2010, so not very old.
thanks
I have 2 banks on a perko battery switch.
bank 1 has 2 batteries.
it is dedicated to the "house", which seems to be just the fridge as far as i can tell.
it also has a xantrex monitor hooked to it and it shows 12V and LOW, even with engine running.
if i measure the battery voltage right now sitting in the drive way of each battery it shows 13.7 volts??? but the boat gauge and the xantrex both show 12 volts? so 2 seperate gauges reading the same thing on bank 1.
bank 2 is is a single battery. it does have a bass tube directly wired too it.
measures 13.7 V with a meter right now in the driveway and also looked fine while running at around 14V.
I have a blue sea ACR that combines the banks and i can see the gauge drop from 14V to 12.5-13V whenever the 2 banks combine.
what should I test next?? Batteries are all mfg 2010, so not very old.
thanks