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Thread: headlight problem - electrical confusion

  1. 5th June 2014, 09:39 PM #11
    inside's Avatar
    inside
    inside is offline Wizard Subscriber
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    Pete, first thing to check is the earth straps from the engine to chassis and the gearbox to chassis. I know it sounds not related but I've read some interesting problems that occur when these eventually give way.
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  2. 5th June 2014, 09:40 PM #12
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    Blknight.aus
    Blknight.aus is offline RoverLord Vendor
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    3 common things

    1. earth. done to death. Low beam still works (well appears to work) because when its got power theres enough flow through the high beams to earth on the other side to get some light out of it. Bet the patterns off

    2. connector insulation. theres corrosion or crap in the terminal thats stopping the power from getting to the filament. Just because you see volts there doesnt mean theres amps flowing

    3. the connector is wired wrong and you have the low beam power and earth lead back to front.

    landrover specials

    1 fuse per circuit per bulb at the front, (and all of them fed from one ****y unrelayed power feed through the control arm switch) on some models you might have a high resistance joint in behind the fuse panel.


    Fareys landrover electrical faultfinding 101 for shed class dumb wiring.

    use a 21W or 60W (depending n what size load your ment to be fault finding for) head light bulb when you test for voltages on a circuit. if the meter shows you a voltage but you cant make either of those 2 lights light up at the testing point you've got a high resistant joint somewhere further upstream in the circuit, The batteries showing you its there but its not pushing any power.

    The number of times I've fixed perentie headlights just by taking to the fuse holder with a bit of emery paper, contact cleaner, contact sealant and a pair of needle nose pliers probably exceeds the number of typos ive made on aulro.

    put your alternator in the back of your lightless vehicle and come on over already.....
    Dave

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  3. 8th June 2014, 05:13 PM #13
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    rar110
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    The problem is fixed.
    It was either a bad H4 plug (replaced) or corroded fist terminals (cleaned with mini wire brush).
    L322 tdv8 poverty pack - wow
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  4. 8th June 2014, 06:02 PM #14
    Devans
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    Sorry to hijack this post, but I have a similar question…

    When I put my lights on low beam, the left head light is on low beam, but the right is high beam. When high beam is switched on the left is high and the right is low. I'm assuming this is just two wires have been switched, but when I tried to pull the two red cables out of the headlight socket I couldn't get them out.

    Thanks.
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  5. 10th June 2014, 10:02 AM #15
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    Update on my issue: I had the driver's side headlight only coming on dimly and it switching off the new LED parker light when it did so.

    Solution in the case of the County was to pull the headlight and test it by making a good, temporary earth from the back of the H4 plug's earth terminal to the chasis. When that worked, it proved that the earth was at fault.

    All the lights on that corner were sharing a 6-way female bullet connector behind the headlight. I just pulled all of the bullets out, thoroughly cleaned the 6-way connector, rubbed the contacts with a bit of wire to brighten them up and reassembled firmly.

    Working fine now, though I still have some other earthing points sure up.
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