Mystery fuse




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Thread: Mystery fuse

  1. #1
    Join Date
    Jun 2010
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    Default Mystery fuse

    Puzzled by this 60A fuse mounted on the side panel next to the engine fuse box. Brown wire comes from the charging fuse, alternator side, in the engine fuse box to this fuse, then thick orange-grey wire joins loom through the firewall by the accelerator. Thereafter it disappears behind the dashboard without going via the internal fuse box. It is certainly not in any wiring diagrams I can find.

    I thought it was a mod by the PO but the wiring in the loom looks original. There is another thinner orange-grey wire in the fuse box which is for the rear window heater.

    Tried disconnecting it to see what doesn't work but I can't find anything (without starting the engine, which I can't atm for other reasons).

    Other oddity is the alternator fuse is 60 amp whereas afaik it should be 100 amp.
    Attached Images Attached Images  
    '97 Discovery ES 3.9 Auto MS1
    '84 Bertone X1/9

  2. #2
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    klerksdorp
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    Default

    murphys law leave it alone

  3. #3
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    Default

    I can't leave it alone because its in the way.

    Anyway I found it.. you just have to look at the right model in Rave.

    Its for the front window heater, I did not know I had one, nor why I would need it, nor how to switch it on.
    '97 Discovery ES 3.9 Auto MS1
    '84 Bertone X1/9

  4. #4
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    Default

    Quote Originally Posted by AncientGeek View Post
    Its for the front window heater, I did not know I had one, nor why I would need it, nor how to switch it on.
    Most likely the original windscreen which had the heater has been replaced already with a windscreen without the heater (much cheaper) . My P38 had a windscreen heater and this was very evident when driving into the sun as the sun would reflect off the very very thin wires that were inside the screen. If your car had this you WOULD have known about it (unless you need glasses).
    Best regards
    Philip
    LR: '11 Rangie 5.0 S/C
    LR: '01 Disco 2 XS 4.6 V8
    Ford: '14 Ranger 3.2 Auto SuperCab 4x4
    Jaguar: XJS 5.3L V12 (Megasquirt, 5sp manual)

  5. #5
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    Default

    Good to know, I had to replace my heated windscreen recently with a cheaper version, could use the feed and switch on the dash for something else now.

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