Alternator light.

An alchemy of sparks, copper wire and earth

Moderators: Moderators, User administrators

Post Reply
User avatar
ricicles
Posts: 934
Joined: 16 Mar 2008, 17:47
80-90 Mem No: 6350
Location: wymondham

Alternator light.

Post by ricicles »

First trip away this year . Alternator light came on but goes out at higher revs.
I have measured the voltage from the alternator . Its showing 11v at tickover.
Should it be more or is this normal at tickover.
Should I be looking for a fault elsewhere?

User avatar
Jim San
Posts: 1668
Joined: 21 Jan 2014, 20:01
80-90 Mem No: 13133
Location: Shropshire syncronaut 244
Contact:

Re: Alternator light.

Post by Jim San »

Low charge. 
belt slack, poor earth, poor connection at terminals are first things to check.

Worn brushes, simple and easy fix, change brush pack.
1991 Syncro kombi 1.9MTDi Passat 1Z Landy fuel pump 215/70/16

Life's to short to drink s@@t beer.

User avatar
Mocki
Membership Admin
Posts: 14988
Joined: 29 Sep 2005, 09:27
80-90 Mem No: 428
Location: Mansfield tel/txt 07947137911
Contact:

Re: Alternator light.

Post by Mocki »

It should be 14.5v ideally as soon as the engine is running . Tickover shout be any different , it’s alternator not a dynamo! 

It’s the brush pack .

when you measure the out put voltage measure the the back of the alternator, using the casing as neg .
then measure again using the van body as neg , any difference and you need to clean the alternator amounting points and earthnstraps . 
Steve
tel / txt 07947137911
Image
just one shade of very fast grey
________________

1989 2.1LpgWBX HiTop Leisuredrive Camper

User avatar
tobydog
Posts: 810
Joined: 07 Mar 2009, 21:03
80-90 Mem No: 6484
Location: Near Saarfend, Essex

Re: Alternator light.

Post by tobydog »

Knowledge is power
1970 CU

Post Reply