so.... electrical question - asking for a "friend"....
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Thread: so.... electrical question - asking for a "friend"....

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    Senior Member badcat's Avatar
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    so.... electrical question - asking for a "friend"....

    the starter solenoid is just a heavy duty relay - right?
    the two smaller wires get power - and close the circuit between the two large terminals - right?
    if "someone" were to bridge the two large terminals - would any electrical damage result?
    my "friend" has lost all power to his TW after this and is a bit worried he has fried something important.
    he tells me that the main fuse is still good.

    any thoughts?


    ....



    (oops)

  2. #2
    rbm
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    Test the main fuse with a multimeter, I'd guess your "friends" fuse is blown... Check the connection at the battery too, could have arced if loose and needs to be cleaned...
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    Senior Member AGman's Avatar
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    There is a blade fuse on the solenoid on these models I think? Is that OK? There is also a fusable link from one of the terminals...this can rot away if left in crud.
    Last edited by AGman; 09-18-2015 at 06:32 PM.
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    Senior Member badcat's Avatar
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    Quote Originally Posted by AGman View Post
    There is a blade fuse on the solenoid on these models I think? Is that OK? There is also a fusable link from one of the terminals...this can rot away if left in crud.
    no - it's the earlier one with no fuse on the solenoid.

    ; (

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    Senior Member badcat's Avatar
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    Quote Originally Posted by TWilight View Post
    Ken...your "friend"...is a poopy head

    yes - yes he is. we have had words. and he is very ashamed.

    ken

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    Senior Member AGman's Avatar
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    Bugger.
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    Super Moderator Purple's Avatar
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    If all the electrics are out - either it's every wire and component on the bike - or one fuse (the only fuse) - it may look good, but test it, wriggle it, replace it etc - and include the NEGATIVE connection to the battery or earth in your testing (a circuit has to complete in order to work) .........
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    Quote Originally Posted by Purple View Post
    If all the electrics are out - either it's every wire and component on the bike - or one fuse (the only fuse) - it may look good, but test it, wriggle it, replace it etc - and include the NEGATIVE connection to the battery or earth in your testing (a circuit has to complete in order to work) .........
    it was a long day yesterday - decided i will get the running one sorted - then look at the other one fresh.

    thanks!
    ken

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    Senior Member slowmod's Avatar
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    Quote Originally Posted by badcat View Post
    the starter solenoid is just a heavy duty relay - right?
    the two smaller wires get power - and close the circuit between the two large terminals - right?
    if "someone" were to bridge the two large terminals - would any electrical damage result?

    (oops)
    yes the solinoid is a relay, which is a switch that is physically moved by an electromagnet. the two small wires power the electromagnet. either or both sides may be switched. when the small wires have + and -, it pulls the switch and connects the two big terminals.

    so bridging the two big terminals is in fact the same as turning on the switch, and, basically speaking, it will not harm anything *electrical*.

    it will, however, (if bat/wires/starter are good) turn on the starter, and if the bike is in gear, well, something *physical* might be harmed. fingers. beer. etc.

    half-heartedly making the connection can result in arking and heat and melted threads on the studs. lean into it. bridging with a thin wire will heat the wire quickly.

    i used to have an old truck that i jumped the soliniod on the inner fender to start. i kept a 2' length of 4ga with bare ends.
    the very important thing was/is to remember to take it out of gear.

    -
    Last edited by slowmod; 09-19-2015 at 08:22 PM.
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    Senior Member badcat's Avatar
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    Quote Originally Posted by slowmod View Post
    yes the solinoid is a relay, which is a switch that is physically moved by an electromagnet. the two small wires power the electromagnet. either or both sides may be switched. when the small wires have + and -, it pulls the switch and connects the two big terminals.

    so bridging the two big terminals is in fact the same as turning on the switch, and, basically speaking, it will not harm anything *electrical*.

    it will, however, (if bat/wires/starter are good) turn on the starter, and if the bike is in gear, well, something *physical* might be harmed. fingers. beer. etc.

    half-heartedly making the connection can result in arking and heat and melted threads on the studs. lean into it. bridging with a thin wire will heat the wire quickly.

    i used to have an old truck that i jumped the soliniod on the inner fender to start. i kept a 2' length of 4ga with bare ends.
    the very important thing was/is to remember to take it out of gear.

    -
    thank you - that is what i thought.
    hopefully it's something small.....

    ken

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