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Thread: Xyz switch, just confirming before I commit

  1. #31
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    Should only need the ignition on. Have you looked for power at the trailer plug?
    If you don't like trucks, stop buying stuff.
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  2. #32
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    Quote Originally Posted by V8Ian View Post
    Should only need the ignition on. Have you looked for power at the trailer plug?
    Last time I used the trailer was after the reverse lights stopped working and they were fine then but I will double check to confirm
    P38 Range Rover , the best car in the world, when it's working

  3. #33
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    Quote Originally Posted by finallyrangie View Post
    ..... the test meter says there is no voltage at all to the light fitting, if the reverse is displaying on the dash should there be something or is it a completely separate circuit?

    ......
    Same line from xyz switch to the connector I mentioned behind the dash/fuse box .. which is very hard to get too!

    Another connector you can look at for power to the reverse lights is located in the passenger footwell.
    On the body side of the footwell behind the panel is a couple of grey connectors. One up high, one down low. The lower one should be under a brown connector.
    The grey connector block is marked as C0102 for the male side, and C0484 for the female side.

    To confirm that power is going to the female side, look for the green/brown tracer wire. There's only one in the 18 pin block with this colour.
    With the reverse lights activated(ign on, select reverse) you should have power on the female side coming from the hard to get too connector behind the fuse box.
    If no power there, there's nothing else but to trace why no power .. is it the pin in the block, or the wire itself, or a broken connection at the hard to get too connector, or even fuse box?
    You have to remove the fuse box to get to the hard to get too connector.

    Also, now if you have the grey connector in the LH footwell apart, you could also try to send 12v via a jumper wire on the green/brown wire to see if the reverse lights light up too.
    This grey connector male side is how the wire runs up the LHS body, up to the mirror and across the LH side roof under the headlining to the rear of the car.

    So remember the split from the transmission(XYZ) to the BCU and to the actual reverse globes happens at the hard to get too connector behind the fuse box.
    But there are about 3 or 4 connectors beyond this difficult connector again to the rear of the car.

    OK, I just worked out how to get the rave electrical diagram saved as a usable image to show you what you are looking for

    Arthur.

    '99 D1 300Tdi Auto
    '03 D2 Td5 Auto

  4. #34
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    Quote Originally Posted by finallyrangie View Post
    Thanks for all the replies, and sorry for the slow reaction, time is a bit tight over the week.

    Rear wiper works on the switch and all the fuses seem to be alright, let's face it, it's fairly obvious if they have blown!........................
    ....................Any and all help and suggestions gratefully received
    I don't have a D2 but an ex GF did. Had horses and towed a float sometimes.

    Had really weird issues with the rear lights, I checked all the globes... not the issue.

    Pulled all the 50 odd fuses one by one and found the culprit.

    Dunno how you can say it's obvious if they've blown. It certainly wasn't in this case. Gotta pull them all out and have a look, with complex wiring systems.

    Spade fuses can arc on the terminals and become intermittent without blowing their guts.

    Replaced the fuse and all was good till the float was hooked up again and the problem came back. Same obscure fuse blown.

    Finally figured out the earth through the trailer plug to the float was working but 'lacking' so duplicated it via the spare trailer loom wire and all was good.

    DL

  5. #35
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    Switch Replacement

    Prior to parting with your hard earned dollars using a multimeter set on continuity confirm that the switching contacts are all functional. This is not a fully guaranteed proving procedure as it has been known for contacts to test OK but not pass current, however it is very uncommon for this to occur.

    An invaluable tool is a 12V battery with a 12V globe wired across the terminals with a set of test leads. With the vehicle battery disconnected you can use this as a source to prove wiring connected to the non functioning circuits.
    2014 Silver Discovery 4 L319 TDV6
    Redarc Electric Brake Controller
    UHF Radio
    Switched Trailer Light Connection

  6. #36
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    Quote Originally Posted by AK83 View Post
    Same line from xyz switch to the connector I mentioned behind the dash/fuse box .. which is very hard to get too!

    Another connector you can look at for power to the reverse lights is located in the passenger footwell.
    On the body side of the footwell behind the panel is a couple of grey connectors. One up high, one down low. The lower one should be under a brown connector.
    The grey connector block is marked as C0102 for the male side, and C0484 for the female side.

    To confirm that power is going to the female side, look for the green/brown tracer wire. There's only one in the 18 pin block with this colour.
    With the reverse lights activated(ign on, select reverse) you should have power on the female side coming from the hard to get too connector behind the fuse box.
    If no power there, there's nothing else but to trace why no power .. is it the pin in the block, or the wire itself, or a broken connection at the hard to get too connector, or even fuse box?
    You have to remove the fuse box to get to the hard to get too connector.

    Also, now if you have the grey connector in the LH footwell apart, you could also try to send 12v via a jumper wire on the green/brown wire to see if the reverse lights light up too.
    This grey connector male side is how the wire runs up the LHS body, up to the mirror and across the LH side roof under the headlining to the rear of the car.

    So remember the split from the transmission(XYZ) to the BCU and to the actual reverse globes happens at the hard to get too connector behind the fuse box.
    But there are about 3 or 4 connectors beyond this difficult connector again to the rear of the car.

    OK, I just worked out how to get the rave electrical diagram saved as a usable image to show you what you are looking for

    I have found the grey connector under the brown connector and the brown/ green trace wire, I seem to be getting about 11v across it, regardless of the gear it's in, thought all was well in reverse and had voltage, just to check put it back in park, same voltage, all gears the same. Your description was very precise so I'm pretty sure it's the correct wire, I can only assume I'm moving the fuse box next and starting right at the end of the line.
    P38 Range Rover , the best car in the world, when it's working

  7. #37
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    This sort of hair tearing problem is why I have a PowerProbe.
    ​JayTee

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    ​Getting involved in discussions is the best way to learn.

    2000 D2 TD5 Auto: Tins
    1994 D1 300TDi Manual: Dave
    1980 SIII Petrol Tray: Doris
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    Nanocom, D2 TD5 only.

  8. #38
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    Quote Originally Posted by finallyrangie View Post
    I have found the grey connector under the brown connector and the brown/ green trace wire, I seem to be getting about 11v across it, regardless of the gear it's in, thought all was well in reverse and had voltage, just to check put it back in park, same voltage, all gears the same. Your description was very precise so I'm pretty sure it's the correct wire, I can only assume I'm moving the fuse box next and starting right at the end of the line.
    Yeah, should be no power going by the wiring diagram, so shorting to somewhere. I'd say fuse box area is the most logical point to start at.

    With that grey connector, there are two other green wires with similar to brown tracers.
    In one corner is a Red/orange(note colour after / is always the tracer!) .. this is pin 1.
    Opposite that is pin 9 Green/purple. Depending on colour vision accuracy purple can look similar to brown.
    2 pin inwards on the same row as Pin 9 is Pin 11 .. is the Green/brown.
    Same row as Pin 1's Red/orange .. ie. opposite the Green/brown .. is Green/red. One more pin inwards and opposite of the Green/brown.

    So, to confirm: in that diagram, Pin 11 Green/brown on the wire is shows C0102-11. On the physical connector, Pin 11 is the third wire on one row from the Green/purple wire pin(which is Pin 9)

    But there should not be any power through it when reverse is not activated. . otherwise reverse globes will be on all the time.

    ** Also important point to note here with this connector .. could be that if you have a D2a, wiring can be different. I've seen threads where some wiring is different.
    I can't remember where my copy of a D2a wiring is on my PC .. I use that copy(displayed) as this is what I have .. non D2a.

    What is weird tho .. why you have 11 volts on the wire, but globes aren't on all the time.
    Two points will be, you have an earth issue, or another break past that point, ie. away from the fuse box and towards the globes .. so note the other connection points back from there.
    If you don't have those two problems .. having 11v on that wire and no globes lit up(maybe no bright, but lit up all the same) ... makes no sense.

    So, not only look for the cause of the 11v back towards the fuse box, but also look for the issue from that connector forward to the globes too.
    Reemmber there is a connector at about the B pillar pass side under the headlining too.. then another connector in the D pillar behind lights(to trailer) .. etc.
    Going by the diagram, there is supposed to be a loose Green/brown wire down the rear end there with the trailer take off plug.
    Has anyone recently done some work back there? Has this issue been there since you had the D2, Roughly when did it start.
    Maybe that loose wire back there is fusing or something.
    Sorry, couldn't begin to describe what/why could be causing this .. never noticed any of this wiring back there.
    Driver side behind rear tail light is the trailer harness plug. Has someone mistakenly wired into the spare/free/unused green/brown wire by mistake .. has some crud got back there and fused up?
    Do you have a additional reverse light fitted and it's playing up? If so, has it been wired to this point.
    Arthur.

    '99 D1 300Tdi Auto
    '03 D2 Td5 Auto

  9. #39
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    Quote Originally Posted by AK83 View Post
    Yeah, should be no power going by the wiring diagram, so shorting to somewhere. I'd say fuse box area is the most logical point to start at.

    With that grey connector, there are two other green wires with similar to brown tracers.
    In one corner is a Red/orange(note colour after / is always the tracer!) .. this is pin 1.
    Opposite that is pin 9 Green/purple. Depending on colour vision accuracy purple can look similar to brown.
    2 pin inwards on the same row as Pin 9 is Pin 11 .. is the Green/brown.
    Same row as Pin 1's Red/orange .. ie. opposite the Green/brown .. is Green/red. One more pin inwards and opposite of the Green/brown.

    So, to confirm: in that diagram, Pin 11 Green/brown on the wire is shows C0102-11. On the physical connector, Pin 11 is the third wire on one row from the Green/purple wire pin(which is Pin 9)

    But there should not be any power through it when reverse is not activated. . otherwise reverse globes will be on all the time.

    ** Also important point to note here with this connector .. could be that if you have a D2a, wiring can be different. I've seen threads where some wiring is different.
    I can't remember where my copy of a D2a wiring is on my PC .. I use that copy(displayed) as this is what I have .. non D2a.

    What is weird tho .. why you have 11 volts on the wire, but globes aren't on all the time.
    Two points will be, you have an earth issue, or another break past that point, ie. away from the fuse box and towards the globes .. so note the other connection points back from there.
    If you don't have those two problems .. having 11v on that wire and no globes lit up(maybe no bright, but lit up all the same) ... makes no sense.

    So, not only look for the cause of the 11v back towards the fuse box, but also look for the issue from that connector forward to the globes too.
    Reemmber there is a connector at about the B pillar pass side under the headlining too.. then another connector in the D pillar behind lights(to trailer) .. etc.
    Going by the diagram, there is supposed to be a loose Green/brown wire down the rear end there with the trailer take off plug.
    Has anyone recently done some work back there? Has this issue been there since you had the D2, Roughly when did it start.
    Maybe that loose wire back there is fusing or something.
    Sorry, couldn't begin to describe what/why could be causing this .. never noticed any of this wiring back there.
    Driver side behind rear tail light is the trailer harness plug. Has someone mistakenly wired into the spare/free/unused green/brown wire by mistake .. has some crud got back there and fused up?
    Do you have a additional reverse light fitted and it's playing up? If so, has it been wired to this point.
    Mine is a D2a, which might be the issue, the location of the wire you described is nothing like the one I found, I will have another look on the plug and try to get the location correct, even if the colours are different, and see if that is the connection in looking for.
    Planning to get the headliner out, hopefully next month, anyway to do some rust repairs in the roof and get it recovered so will check any and all connections in the roof space then.
    No extra reverse lights but previous owner does have lots of wiring for solar, fridge and the like in the back, so that might be complicating the issue somehow as well.

    Will try to recheck the plug on the public holiday and post results.
    P38 Range Rover , the best car in the world, when it's working

  10. #40
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    Quote Originally Posted by finallyrangie View Post
    Mine is a D2a, which might be the issue, ...
    Yep.. I'll have a look for my copy of the D2a wiring, and get back.

    OK, wasn't hard to find .. just common sense.
    The RAVE files aren't called electrical library or circuit diagrams .. they have cryptic names. Anyhow found the D2a diagram, it does say NAS LHD, but I doubt this would make any difference, the electrics for most of the lighting that I could see was similar/same anyhow... do reverse globe circuits is the same for D2a too .. green/brown wire.

    Why yours has 11v on it .. only a fusing crosswire issue would cause this me thinks. I'm not an electrical type person by any means, but have the ability to navigate around circuit diagrams to fix issues I come across.

    I'd suggest go back to that grey switch disconnect check power at both sides of the connectors. Is the 11v comeing from the male or female side of the connector.
    At least you can figure out where the power is coming from. Why the globes are not on whilst you have 11v through there is a strange one.

    So I reckon you may have an issue backwards of the grey plug if your wiring conforms to that of the circuit diagram.

    I'm checking the connector section of the electrical section .. and down there in the footwell, the other grey connectors are smaller(one 8 pin, the other 12 pin) They are the two higher up in the column of connetcors in that location. So if you found the Green/brown wire .. I reckon the one you have is the correct one .. ie. some else hasn't been in there and moved stuff around.

    Disconnect, check which side has power which one hasn't.

    With ign off or reverse not engaged there shouldn't be any power back there.

    have you removed the drivers side tail light unit? has someone installed some sort of device back there at some point in time, and removed the unit but left the other electrically connected part and is causing issues.

    as an example .. say a previous owner(or even you) have installed a rear reversing led worklight .. and wired via a relay on the wiring loom. Removed the actual light unit, but left the relay in there now connected to nothing. Now it's playing up giving you grief.

    I always check for annoying anomalous stuff like that.

    One last point .. not that it makes much difference. Now knowing yours is a D2a .. electrical diagram in this area is very similar to D2. One difference is I previously said back in the RHS pillar should be a spare reverse light wire(green/brown) going to the trailer plug that is in there behind the RHS tail light.
    D2a doesn't have the spare green/brown wire going to the trailer pickup point, according to the wire diagram.
    Arthur.

    '99 D1 300Tdi Auto
    '03 D2 Td5 Auto

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