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Another Electrical Problem

Discussion in 'Land Rover Discovery' started by border, Nov 13, 2019.

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  1. border

    border Well-Known Member

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    OK Really sorry for not stating which engine I have or for changing my Profile. My Disco is a 2 door R Reg,. 300Tdi had quite a few modifications for Off-roading by the PO, I just wanted a normal Discovery for the winter, but seen a lot that were full of rust, and needed lots of welding aswell as other work, this One is really good with lots of new parts, suspension ect, so couldn't refuse it.
    Just sorting out a few problems along the way.
    Anyway back to this Problem. Will try new Relay and Just hope that's all it is. Could it be possible that I have the connectors on the wring spades on my Relay ? Do they have to go on certain Order ??
     

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    Last edited: Nov 14, 2019
  2. dieseldog69

    dieseldog69 Well-Known Member LZIR Despatch Agent

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    Unless you unplugged them first then they were working fine, yes they go on in a certain order, I posted a relay wiring diagram for you ;)
     
  3. border

    border Well-Known Member

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    It all started when I noticed the Inline fuse, just off Relay needed changing, when changing it a couple of the spades came off the Relay, I thought Id put them back on right way but Maybe not.
    Just been looking at your diagram, think I know what goes where. There is 2 red and 2 black to go back in to my Relay. one of the reds has a smaller red and black spliced in to it, I think this one is for the Blower.
     

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  4. dieseldog69

    dieseldog69 Well-Known Member LZIR Despatch Agent

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    Sounds like we have found the problem!

    If I were you, I would probably look to get a that lot stripped out and re-made to a better standard lol.

    If you look in my build thread you will see how I have tried to keep my wiring tidy with things like relay boxes and wiring connectors for panels and such where I have added new wiring and or switches.
     
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  5. border

    border Well-Known Member

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    Yes Mate the spade connectors on mine are not a very good fit, I will try them in a different order and if it works I will renew them all to a nice tidy tight fit.
    Fingers crossed it will work.
    Thanks for Your help
     
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  6. Stanleysteamer

    Stanleysteamer Well-Known Member

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    Ouch! had to put my sunglasses on, dog looks lovely, is it yours?
    If the battery is disconnected or at least the ignition switch off, I doubt the order of plugging in the connectors matters, after all, you normally pull the relay out in one go and put it back in in one go!
     
  7. Stanleysteamer

    Stanleysteamer Well-Known Member

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    You call that "spliced into it"!!!!!!!!! What a ferking bodge! AND there is black tape on the crimped on connector! Even a Scotchlok would have been better! Could the bare wire we can all see have been earthing or arcing to earth?
     
  8. Stanleysteamer

    Stanleysteamer Well-Known Member

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    Note I did say the Order, you plugged them in wouldn't matter, not the positions in which you plugged them!:eek:
     
  9. border

    border Well-Known Member

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    Yes my dog Belgium Malinos, think that's how its spelt. It does look a mess now as I ripped all the tape off to get at it
     
  10. Stanleysteamer

    Stanleysteamer Well-Known Member

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    Reminds me of buying an old house and then taking the wallpaper off to redecorate and finding pipes, wires, dry rot etc buried in the walls!
    Are you going to do any panel beating to reshape the dented panels on your otherwise non-rusty truck? Well done on the dog by the way!!!
     
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  11. border

    border Well-Known Member

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    Well Still No Joy, Probably a simple explanation to those that Know about these things.
    Think I need to get someone who knows what their doing. Tried everything back in right order but still the same. Put a Test Light on them, Only one that lights up is number 2 don't know what the 2 thinner wires are for that's joined in to it.
    When 1and 2 are touched together the Blower starts working. Blower switch has no effect. Number 4 goes to Earth on side of wing, I took it off and cleaned it up. Not sure where number 3 goes to. I did get new Relay but just the same so probably not that.
     

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  12. Stanleysteamer

    Stanleysteamer Well-Known Member

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    If when 1 and 2 are touched together, blower starts working, one must be the feed and the other must be the wire to the blower, which is obviously earthed properly or it wouldn't work, as the switch makes no difference then neither wire comes from the switch. These two should be in positions 30 and 87. Use a meter or test bulb to find out which is the positive when the ignition switch is on, then put that one to 30, and the other to 87. If you can't work this out. don't worry about it, just put one of the two to 30 and the other to 87, it don't make any difference really. You now have a relay which is just waiting to be closed by getting the power from the switch to flick the solenoid in the relay over to close the connection between 30 and 87. Put the wire from the switch, or the wire you cannot work out what it does!, to 86, then 85 goes to earth, as you said.
    The realy should now power the blower via the switch.
    As for the dials and CB, let us know if this changes now.
    Best of luck.
    Stan
     
  13. Stanleysteamer

    Stanleysteamer Well-Known Member

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    Just reread your last post, number 2 wire should be in position 30.
    If you follow my thinking and position your wires that way and the blower doesn't work, then the switch wire is not working. Either cos the switch itself is bust, which you can easily check with a meter set to resistance, OR the feed from switched positive from the ignition switch to the blower switch, OR from the switch to the relay, is broke, shorted to earth or summat.
     
  14. border

    border Well-Known Member

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    Thanks Mate, All that does make sense. Will have a good look at wirers from switch tomorrow.
     
  15. border

    border Well-Known Member

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    Well Tried to trace all the wires, and they all seem OK, cant see any breaks or any bad earths ect.
    But still the same, Cant get the Dials working again, so I've took 1 and 2 both Reds off the relay in Pic and put 2 new wires from the Switch to them at least the Blower works again.
    Will this be OK as Nothing really going to the Relay now. ??
     

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  16. Stanleysteamer

    Stanleysteamer Well-Known Member

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    If I've read your post correctly this now means that all the juice that the blower takes is now going straight through the switch. This may be OK but I am concerned that the switch may not be able to take the high current for very long and may well overheat, melt, etc etc.. You would be better off sourcing another relay and then rewiring it from a fresh source of feed, from switched feed from ignition, and then using the existing wires from the switch to act as a trigger.
    The dials will take a much lower power so they should be easier to fix but the triggers to them may well prove to be more fiddly as you will have to sort out which wire is the sensor and what it connects up to.

    Still cannot help but feel there is one major source of this problem and once you find it you'll solve the whole thing all at the same time.
    Don't ferk about with this mate as the last thing we want to read is that your disco went up in flames due to a wiring problem.
     
  17. border

    border Well-Known Member

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    Did try new Relay but just the same. Im now thinking that I should of maybe left them in Relay except number 3 which goes to switch, then put new wire in that one back in to Relay. Or maybe not,
    But You are Right there there has to be one source to the problem, probably a simple fix if this could be found. Will keep an eye on the switch for melting ect. Thanks for the Warning.
    As for the Dials Ill do a bit more Googling and watch a few youtube vids, befor attempting it.
     
  18. border

    border Well-Known Member

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    Well Think I've got a good Idea of how to get these working again. :rolleyes: Found the 2 main wires connecting them, wired them to my Drill Battery just to test them and the Lights came on.
    I cut the 2 main wires coming from the CB AS I dont want it back in. These 2 wires 1 Red and 2 Black lead to the plastic boxes that have the wires from Dials going in to them, They also come out the back going down to God Knows Where in the car.
    Now IS it a Matter of Earthing one and the other to Live ??
     

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  19. Stanleysteamer

    Stanleysteamer Well-Known Member

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    I would really need to be looking over your shoulder to be able to advise you at this point.
    However, if you have two wires and you want to if one is live and one is earth, you can connect one to your ohm-meter and the other probe off the ohm-meter to a good earth. If the ohm-meter shows a reading of close to zero, you know you have found the earth wire. If it doesn't do that, switch it to "volts DC" and make the same connections, if you then get 12Volts or thereabouts, you know you have a twelve volt feed, and this may only come on with the ignition in last but one position, i.e just before "start".

    Dunno if this helps!
     
  20. border

    border Well-Known Member

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    Thanks. Need to get an ohm-meter, with a continuity tester probe thingy, The Black wire number 2 in pic Lights it up, there is nothing on the Red nember1, so does that mean that my Black is Live. Now I would have thought that Black was Earth and Red was Live. But maybe not in this case ??
     
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