2000 Dispatch: Battery light flickering very dim, terminals at 14.3V, alternator replaced 2 weeks ago.

This is the Forum for all your Citroen Technical Questions, Problems or Advice.

Moderator: RichardW

kenbw2
Donor 2017
Posts: 270
Joined: 23 Dec 2014, 01:24
x 21

2000 Dispatch: Battery light flickering very dim, terminals at 14.3V, alternator replaced 2 weeks ago.

Post by kenbw2 »

Just done a service - including a new fan belt.

Started it up and noticed the battery light is on very dim. While driving it flickers between dim and off, notably when decelerating it goes off entirely

I tried disconnecting the battery with the engine running, light still on dim.

It's definitely charging - the voltage at the terminals is 14.3V

Edit: Notably I had a dead alternator on it 2 weeks ago, which I replaced with a second hand one which worked fine till now.
Last edited by kenbw2 on 03 Apr 2019, 22:14, edited 2 times in total.

Peter.N.
Donor 2020
Posts: 9938
Joined: 02 Apr 2005, 16:11
x 345

Re: 2000 Dispatch: Battery light flickering very dim but terminals at 14.3V

Post by Peter.N. »

Do you notice any variation in the brightness of the panel or interior lights? If not could be an alternator fault or a poor electrical connection somewhere. Personally if its still charging OK I wouldn't worry about it, just check the battery voltage periodically. Check the thin wire connection on the alternator.

Peter

Nemo26
Posts: 59
Joined: 19 Apr 2017, 09:26
x 3

Re: 2000 Dispatch: Battery light flickering very dim but terminals at 14.3V

Post by Nemo26 »

Google ac ripple test. You have too much ac current in system. Diode failure probably.

kenbw2
Donor 2017
Posts: 270
Joined: 23 Dec 2014, 01:24
x 21

Re: 2000 Dispatch: Battery light flickering very dim but terminals at 14.3V

Post by kenbw2 »

I hope not, I've just replaced the alternator 2 weeks ago - admittedly with a second hand one, but still.

Does this point to an issue somewhere in my electrical system?

User avatar
white exec
Moderating Team
Posts: 6080
Joined: 21 Dec 2015, 13:46
x 1013

Re: 2000 Dispatch: Battery light flickering very dim but terminals at 14.3V

Post by white exec »

Don't run the engine with the battery disconnected. Risk of damage to both alternator and other electronic items, due to alternator not being able to read a battery voltage.

kenbw2
Donor 2017
Posts: 270
Joined: 23 Dec 2014, 01:24
x 21

Re: 2000 Dispatch: Battery light flickering very dim, terminals at 14.3V, alternator replaced 2 weeks ago.

Post by kenbw2 »

Hmm I do have a dicky positive terminal connection. Maybe that's destroying alternators?