Help with charging system.
#1
Help with charging system.
Hey, need a little help. My charging system is putting out a constant 16V. I replaced both batteries today with no luck. After 30 seconds the voltage gauge went from 12-13 to 16 again.
Any other thoughts? Voltage regulator? Don't want to burn up my new batteries.
Any other thoughts? Voltage regulator? Don't want to burn up my new batteries.
#2
Advocate of getting the ban button used on him...
Probably voltage regulator but I would check the voltage at the batteries with a good volt meter to make sure the gauge is reading correctly.
#3
Registered User
Check the voltage at the passenger side battery and drivers side battery. It sounds as if your + battery cable that connects your passenger battery to the drivers battery is bad. The ECM senses the voltage on the drivers side battery and adjust the alternator to charge accordingly. If the cable has an issue you will get a voltage drop, hence the overcharging.
#4
Ok, update.
I let the truck warm up and checked both batteries with my fluke. 15V on each. Not sure why, but right when it started it read 13V for about a minute then cycled between 15 and 13 for a few seconds till it warmed up then steady at 15V.
Thoughts?
I let the truck warm up and checked both batteries with my fluke. 15V on each. Not sure why, but right when it started it read 13V for about a minute then cycled between 15 and 13 for a few seconds till it warmed up then steady at 15V.
Thoughts?
#7
Registered User
Sounds about right for charging voltage. The fluctuation was probably the grid heater kicking in and dragging down the alternator briefly.
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#8
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