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Td5 alternator/battery light

Discussion in 'Defender 90 / 110 / 130' started by Hoof-hearted, Oct 17, 2020.

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  1. Hoof-hearted

    Hoof-hearted New Member

    May 19, 2020
    Likes Received:
    East Anglia
    Whilst I was off-roading earlier I had my battery light come on which I understand to mean the alternator is either not charging the battery or is charging but not at normal performance. I decided to cut the day short and start the 2 hour drive home so that I could complete at least a little bit in daylight. Unfortunately after just half an hour I needed my lights and then 30 minutes after that I noticed all the lights dim, I lost my speedo and also fuel gauge.
    As I was on the M25 I called recovery and am currently sat in the cab trying to work out what needs fixing/replacing.
    The odd thing was, when I stopped I left the engine running and gave it a rev but the lights didn’t get brighter. But actually as the revs dropped back to tick over the lights got ever so slightly brighter.

    Because of this I’m assuming that the alternator has packed up, which works out rather convenient as I was going to be fitting one soon to assist with my winch.

    Can anyone recommend any checks I can perform (good with mechanics but have no clue where to start when it comes to electrical instruments). And I’ll be checking them first thing in the morning.

    Many thanks
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