Charging light only goes out after blip

Gavin · Post by **Gavin** » Fri Jun 15, 2007 11:02 pm

So I just converted from generator to a new bosch AL82N alternator.

When I start the engine I have to give the accelerator a little blip to get the charging light to go out - maybe to 1500 revs. Once out it does not come back on when the engine returns to idle.

Anyone know why this happens. It is an internal regulater model.

MedicTed · Post by **MedicTed** » Sat Jun 16, 2007 6:13 am

Used alternator? I'd suspect that one of the diodes is bad in the alternator. It's a very common problem on ambulances (Fords) because of the loads on the alternators and the design. It's usually not a problem, it just means that you may need a rebuild in the next year or two.

Post by **Marc** » Sat Jun 16, 2007 9:31 am

He said it was a new AL82.
I've seen this (high cut-in speed) a few times on the Brazilian-made alternators. I suspect it's just a regulator idiosyncracy - another one might "fix" it but not worth the trouble IMO.
Could even be it'll improve by itself as the alternator develops a little residual magnetic field...

Post by **2088 bob** » Sat Jun 16, 2007 3:35 pm

Seen this more than a few times,no issues

my own car has been doing this for over 20 years now hasn't let me down yet