Hi all
going on a recent 4x4 excursion, started my disco as normal, went scrabbling round in the usual fashion, stalled after about 1.5 hours, and the battery was too dead to restart! from then on, had to get a tow start everytime i stalled.
got home, checked leads, nothing obvious, charged battery, started up, all fine. suspect - alternator.
now, as far as voltmeter values go:
engine off - 12.70 volts
engine on - 12.80 v
turn on heated window, lights, blower - slowly drops to 12.30v, but no lower
turn off all electric things - slowly climbs to 12.70v
engine off - 12.7v ish.
obviously a good alternator should be pushing 13.5V+, so what's going on here? is it half knackered? i thought dead was dead!
any ideas?
Rick