Charging system issue
Hi Guys. I am having a charging system issue. I will list what I have done and checked so far, but as of right now I am completely stumped. I will list a brief history of my problem as well. Any help would be greatly appreciated!
Last year I had my battery light come on when I was on my way home from moose hunting. Tapped the alternator with hammer and made it home. Replaced the alternator with an old one from my Mazda B4000 and problem solved.
Truck was working fine up until now. Parked it overnight and went to go somewhere and the truck started up no problem but the battery light was back on. So here I go:
1.Checked fuses
2.checked battery terminals/connections
3. checked belt and alternator connections
4. tested voltage at battery and alternator
5.Battery not running 12.5. After running starts draining - no charge
6. when I test the alternator I get the same voltage as the battery which slowly dwindles as my accessories drain the batt. Tested the big red wire, and the 3 wire connector. All have less than 12v after I started the truck.
7. brought it to garage, tested with a new battery off the shelf, no go
8. replaced alternator, no go
9. they ordered me a second alternator just to make sure, no go (OEM alternator from Napa)
10. tested continuity from the middle wire of the alternator harness to where it plugs into the alternator Good to go.
11. tested continuity from red wire to positive battery cable where it connects to the battery. good.
12. tested continuity in all fuses with a meter (vs pull and check)
13. Checked a few grounds that I had access to and cleaned them up etc.
So I still have my charging issue. I read about fusible links but have no idea where to look for them. Also, if a fusible link was burned why am I still receiving a voltage reading from the alternator 3 wire harness? Again, the readings I am getting match what is left in my battery after I start the truck.
I am stumped. Hopefully this is enough information to get started!
Any help would be very much appreciated!!!
Kurt
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2007 Ranger Sport 4 x 4 ext cab
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