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Thread: Replaced wiring harness, no starter

  1. #1

    Replaced wiring harness, no starter

    Hello to all,
    Just finished replacing wiring harness which burned up last month due to a short under the tank. (Thanks to all for helping me sort that out) Everything seems to work fine (all lights, horn, turn signals) except for the lack of starter motor. I have the schematic, and this particular (starter) circuit looks somewhat complicated what with the starer lock-out for not in neutral, override for clutch engagement.
    Has anyone done a systematic trouble-shoot for lack of starter engagement? I guess I'll start at the switch, trace to the starter relay, then starter.
    I am really excited to get this figured out and on the road again. While the bike was down for the wiring I did a bunch of other fixes including new tires, SJ top triple tree, new steering bearings. Got in much deeper than I had planned, but hopefully the work will all pay off.
    Thanks
    Theo Marks '74 R75/6

  2. #2
    You've got two wires to the post, and a third on the tab?

  3. #3
    Nathan,
    I am not sure which wires, post and tab you are referring to. The key switch seems to work fine (all lights, warning lights, ect are OK). Just nothing happens when the starter button on R handle bar is pushed.
    Thanks,
    Theo Marks

  4. #4
    Registered User lmo1131's Avatar
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    It's a /6, correct?

    May be a silly question, but is the "re-start lockout switch" functioning and/or connected correctly? It's on the left perch, I believe.

    Not really sure of what I'm talking about here; on my /5 no-restart circuit is built into the relay.
    "It is what you discover, after you know it all, that counts." _ John Wooden
    Lew Morris
    1973 R75/5 - original owner
    1963 Dnepr

  5. #5
    Quote Originally Posted by Markst1 View Post
    Nathan,
    I am not sure which wires, post and tab you are referring to. The key switch seems to work fine (all lights, warning lights, ect are OK). Just nothing happens when the starter button on R handle bar is pushed.
    Thanks,
    Theo Marks
    On the starter, there are 2 posts. A wire to the solenoid is on one, two wires from the wiring harness are on the other. A third, smaller wire from the harness is attached to a tab. I've troubleshooted (troubleshot?) with these wires, but I don't remember what combination yields what results. Just figured I'd make sure it's hooked up properly first.

  6. #6
    Rally Rat
    Join Date
    Feb 2009
    Location
    Chicago, IL
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    276
    I recently dealt with a similar issue and found out there are a few things that will cause the starter button to do nothing:

    1. Bad or improperly wired clutch switch.

    2. Bad or improperly wired diode (the one in the headlight shell, behind the contact board).

    3. Bad starter switch

    Also, make sure that the small push-on connector is making good contact to the tab on the starter. You may want to give it a small pinch with a pair of pliers to make sure it fits snuggly.

  7. #7

    doh

    Well, my fault (suprise). I checked back over everything carefully (including multiple photos that I took after the melt down). And low and behold, one of the wires from the started switch was connected to the wrong tab on the circuit board in the headlight shell. The wiring in the headlight shell a real hair-pie on the /6, hard to get to, hard to see.
    All I can say is that I am glad that I took lots of pictures, really made trouble shooting this easier.
    Bike is back on the road with everything working fine.
    Thanks to all for the help.
    Theo Marks '74 R75/6

  8. #8
    Registered User lmo1131's Avatar
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    Happy Days are here again... .
    "It is what you discover, after you know it all, that counts." _ John Wooden
    Lew Morris
    1973 R75/5 - original owner
    1963 Dnepr

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