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Thread: Electrical Issue '87 ATC250SX

  1. #1
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    Electrical Issue '87 ATC250SX

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    I'm having an issue getting this hooked up correctly. It was on the bike and worked fine when I disassembled it for resto and I didn't take a pic of it before it came apart.

    For the sake of staying on the same page, I'll label the posts as:

    The two closest to the fuse are posts A1 on the left and A2 on the right with posts B1 and B2 below. The two wires are L and R.

    Here goes:
    The A posts both are hot with 12.2 volts and the B posts are 7.1 volts.
    Crossing the two produces 8.1 or -8.1 (A1 and B2 together or vice versa)

    Now hooking up the wires:
    If I hook up wire L to either of the A posts, the fuse blows.
    If I hook up wire R to either of the A posts, nothing happens until I press the starter button. Whether the key is on or off, pressing the starter button causes the neutral light and headlight to come on only while holding down the button. Nothing else.
    '87 ATC 250SX
    '86 ATC 350X
    A bunch of stuff-n-stuff

  2. #2
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    Not sure if it will help but i found this by searching for 30secondsClick image for larger version. 

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  3. #3
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    Quote Originally Posted by Shep1970 View Post
    Not sure if it will help but i found this by searching for 30secondsClick image for larger version. 

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ID:	236695 thats all i got.
    lol...yeah, this solenoid isn't stock. Gimmie just a smidge of credit.
    '87 ATC 250SX
    '86 ATC 350X
    A bunch of stuff-n-stuff

  4. #4
    MPDano's Avatar
    MPDano is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Quote Originally Posted by Helopilots View Post
    lol...yeah, this solenoid isn't stock. Gimmie just a smidge of credit.
    Yup. Your right. Even the wiring diagram has two different colors to trigger the solenoid, his are both black. Here is a pic of the stock solenoid which have the correct trigger wires, which should be coming from your harness.

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    Your diagram wire colors.

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    trace those hacked in wires you got and you'll be good.

  5. #5
    fabiodriven's Avatar
    fabiodriven is offline Aspiring romance novel cover model, and the Official 3WW slayer of thieves and swindlers. Catch me if you can
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    Get the right solenoid fly boy!
    85 Tri-Zinger 60
    85 ATC250SX
    86 ATC250SX
    87 ATC250SX
    02 XR650L conversion
    84 ATC 480R

  6. #6
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    Quote Originally Posted by fabiodriven View Post
    Get the right solenoid fly boy!
    Gimmie yours!
    '87 ATC 250SX
    '86 ATC 350X
    A bunch of stuff-n-stuff

  7. #7
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    Sure, you can make it work.

    But, without the right solenoid, you don't even know how many amps it can switch...
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country

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