Voltage problem? Battery light ON with 15.6VDC
09-24-2010, 01:09 PM
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Mercedes
Voltage problem? Battery light ON with 15.6VDC
I got a 1995 S-420 that the battery light is on on the dash, but if you put a voltage meter read 15.6 VDC. Any idea, HELP
Thanks Voytech
Thanks Voytech
09-25-2010, 04:43 PM
#2
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On my w126 the alternator has a removable voltage regulator.I don't know about your car.My regulator was bad and I was getting 18 volts.I replaced it and got another year out of the alternator before rebuilding it,a few weeks ago.
Over charging can weaken other things like radio,lights ect... It can also mean that battery has shorted cell.
Over charging can weaken other things like radio,lights ect... It can also mean that battery has shorted cell.
Last edited by oldsinner111; 09-25-2010 at 04:46 PM. Reason: warning
09-25-2010, 06:57 PM
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92 500sel/01 320e wag
I read somewhere in a technical manual it looks like the system checks for over and under voltage.
Having said that, I had my instrument cluster rebuilt for the very common flashing issue on the early 140s. The cluster came back and the battery light came on after the inital startup and would flicker in a random fashion for a while. I assumed the alternator had failed and MB and my indi verified charging. The end result was that after replacing the alternator, the random flashing continued, and one day it was gone, and has not returned.
Having said that, I had my instrument cluster rebuilt for the very common flashing issue on the early 140s. The cluster came back and the battery light came on after the inital startup and would flicker in a random fashion for a while. I assumed the alternator had failed and MB and my indi verified charging. The end result was that after replacing the alternator, the random flashing continued, and one day it was gone, and has not returned.
