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Maxim Turn Signal Always On

Discussion in 'XJ Technical Chat' started by swifterthanu, May 19, 2015.

  1. swifterthanu

    swifterthanu New Member

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    1985 xj750x
    Hey guys
    Having a weird problem, my right turn signal light stays on constantly. As soon as I turn the key it is the brightness as if the flasher is on but it doesn't flash. It turns on all associated lights with the signal, not just the front one.
    Tried taking apart the turn signal switch and cleaned it up, but it didn't do anything. Stripped one of the flipping screws holding it on too haha.
    I disconnected the blue wire going to the signal, which shut it off completley. I'm guessing it's a ground?
    I disconnected the black wire going to the signal, which dimmed the light correctly. Don't know where the wire is coming from. I have a feeling there has been someone in here before me, a bunch of wire aren't colored correctly.
    When I turned the bike on with the whole signal switch assembley removed, it still turned on, which doesn't make much sense to me because the only wire according to the wiring diagram that is still getting through would be the running light, in which case the other one should be lighting up as well right?
    Any help would be greatly appreceated! IMG_20150518_161856.jpg IMG_20150518_145413.jpg
     
  2. XJ550H

    XJ550H Well-Known Member Premium Member

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    did you try unpluging the relay? or the cancelling unit
    the turn signal switch does two things , first it activates the relay second it directs power to the left or right bulb

    i think its your cancelling unit.
     
    Last edited: May 19, 2015
  3. schmuckaholic

    schmuckaholic Well-Known Member

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    I didn't have quite the same problem, namely my right side turn signal wouldn't flash (left side worked fine). Turned out there was a loose connection coming off the rear turn signal stem. The bullet connector was fine, but what it plugged into wasn't as tight as it should have been. Snugged it up and it's fine now. Something to check, perhaps.
     
  4. Rooster53

    Rooster53 Well-Known Member Premium Member

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    Assuming you really have a XJ700x, and not a XJ750x as the diagram I am using for reference is the XJ700x.

    The blue wire is for the front running lights and the tail light. It will have power on it when the key is on or in park position. It does not route through the turn signal switch. The running light should go out when you disconnect it. If it is connected to the flasher side of the bulb, well, then that bulb is going to light.

    Black should be ground and should be common for the running light and the flasher light. If you disconnected the black wire to the turn signal neither should illuminate. The correct hookup is Ch - Chocolate for the left side flasher, Dg - Dark Green for the right side flasher, and L - Blue for the front running lights. Since you mentioned colors don't match, then likely it is not connected correctly.

    Does the left side work as it should?

    The flasher and cancelling assembly are combined into one assembly on the xj700x. It should power up with no power at Br/W - Brown White wire. If it was defective, and powers up with 12V at the Br/W wire, then both the left and right side would exhibit the same failure depending on which one was selected, however with a working turn signal switch only one side at a time can illuminate. Also, with a working turn signal switch, pushing will open both left and right so neither flasher can illuminate.

    So, seems you need to get the color coding hooked correctly, Ch to Ch, L to L, and Dg to Dg. It should be easy to check the wires from the turn signals to make sure the colors are correct (should be 3 wires) and some PO has not changed to a different model causing the confusion. Also a good idea to check out the bulbs for the correct wattage and type, particularly if it has never worked for you.
     
    Last edited: May 20, 2015
  5. swifterthanu

    swifterthanu New Member

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    Thanks for the replies guys! I'll get the tank off and check the wires tommorow, I'll let you know how it goes!
     
  6. swifterthanu

    swifterthanu New Member

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    Ok got the tank off today.
    Disconnected the whole flasher assembly, and light remained on, So the flasher assembly is good. The problem must have something to do with the L(blue) wire.
    The signals flash and work perfectly as long as the running light wire is disconnected. The right side used to work, but stopped functioning properly after I took it out of storage this winter.
    Should probably mention my front headlight isn't working either, although it is stuck off. Would occasionally come on before it started and then would go off when it started.

    Right rear signal light is bright as the front, so I'm guessing there isn't a loose connection there.

    The connection the the left side running light was pretty bad. When I pulled it out today it ended up breaking off. I wonder if a bad connection to the left running light is causing less power to be used up, making the right side brighter? Is that possible?
    The wire that broke was supposed to be blue but has been replaced with a black wire. I'll solder a blue wire and a new connector on and see if that works maybe. Took the light apart and check the resistance between the socket and the wire to make sure I knew which wire was which.
    I also took apart, cleaned and put dielectric grease in the main switch. The connection was kind of bad (the key had to be positioned just right), which I thought might have something to do with it but no.
    I'm going to check the light and see, maybe I replaced it with a light that only has one filament in it, I think that might cause the same issues. Will find out soon!
     
  7. swifterthanu

    swifterthanu New Member

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    light bulb is good
     
  8. swifterthanu

    swifterthanu New Member

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    Replaced the black wire with the correct blue one, checked it with a multimeter, and put it back on the bike, same issue. Kinda pissed off at that point, so I just unplugged all the wires going to the signal lights and switched which side of the socket they are plugged into.... Fixed. :/ sooo still don't really know what caused the problem anything more specific than one of the connections was probably loose somewhere. Still don't understand why the running light was so bright.

    Anywho, the signals are now working, but I noticed that one side running light dims slightly when the other side signal light is on.
    Is this normal? This was with the bike off.
     

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