300tdi charging battery at 17volts

[bencorkill]

Know this may be a dumb question but ive never seen anything over like 14.5volts before. Have had alternator light stay on for about 30seconds after starting then going off. When ever i get a volt meter on it light goes off (typical) but its reading just under 17volts and its a brand new battery. Is this right ?

Sorry if im asking should a fire be hot

 

[trax]

no, sounds like alt regulator/rectifier has gone

got the code from your alt like, lucas a127

 

[timtheenchanteruk]

should charge at 14.4V, 17V is going to cook your nice new battery

 

[top drive]

dead diode pack doing a dodo impression

 

[bencorkill]

Can i replace reg/rec/diode or easier tp get a used alternator?

 

[trax]

Can i replace reg/rec/diode or easier tp get a used alternator?

both are easy to do. rectifier is way cheaper get your alt numbers like i said as there can be a few different ones fitted.

 

[bencorkill]

both are easy to do. rectifier is way cheaper get your alt numbers like i said as there can be a few different ones fitted.

Cheers will do that tomorrow

 

[discomania]

Know this may be a dumb question but ive never seen anything over like 14.5volts before. Have had alternator light stay on for about 30seconds after starting then going off. When ever i get a volt meter on it light goes off (typical) but its reading just under 17volts and its a brand new battery. Is this right ?

Sorry if im asking should a fire be hot

View attachment 67900

Make sure you don't drive it, charging a battery at anything over 2.4V a cell will start to damage it, 15V is used as a pulsed charge for 20/30 seconds to knock sulphation off the plates, 17V will destroy the battery in short order. Bet your headlights are great!

 

[bencorkill]

Got the alternator off today



So sticker says is a a127im 100amp so will loom for a rectifire if not may go for a new alternator any ideas on good sellers?

Thanks ben

 

[The Mad Hat Man]

Burghfield Starter & Alternator centre

0118 983 2284.

refurb centre

 

[bencorkill]

Burghfield Starter & Alternator centre

0118 983 2284.

refurb centre

Cheers sent them a email