Question about Honda ST 1100 Pan European (cbs-abs met TCS Motorcycles

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Driving and speedolight

Is the driving light and speedolight supposed to light when motor is not running? the lights works when the engine is running. and the light increases in strength as the throttle is increased. i have changed the battery. i know that it works. the horn and left/right turnlight works when the engine is not running. same with breaklights.
another fault is that the button-motor-starter doesn't work. i have measured the voltage and everything is correct up to the actually starter, so i guess that is the part i have to replace. Can this be the cause of the other problem?
thanks for your replies!

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  • ksjon Jun 19, 2009

    when i remove the battery and measure the voltage at the points where the battery should have been connected, the voltage goes from around 1-2V when idle, and increases to 13V at full throttle.

    To me it feels like there is a wire missing or broken between the battery and the lights (and to the starter). but i cant really figure out what. The battery is brand new today, and I have tested it ok.

    as additional information I can mention that i hear the raeile (relé?) tick when i press the starterbutton.

    i will go through the wiring again for the lights.

    Do you know if there is two sets of powercables going to the lights? one from the engine (coil?) and one from the battery?



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The driving light and all the 'dashboard' lights are supposed to be ON when the key is turned to RUN--even if engine is not running. (blame federal regulators for this dumb idea. Driving light should be wired to come on when engine is running--a simple wiring connection change.)

the comment 'and light increases in strength' is a key clue. It describes low battery voltage. Either the battery is not properly charged, or it is faulty. First try 'jumping' the cycle with a good car battery. If the started works--proves the problem is low battery voltage.

The alternator is working--but is the voltage regulator controlling the voltage? Try measuring the battery voltage (not driving) but in neutral at various increasing engine speeds. The voltage across the battery terminals, everything off, should measure about 13.2 volts. With engine running, it should quickly rise to 13.5 V at or just above idle, and not rise much/any more as engine speed increases. If it keeps rising to above 14 V , the voltage regulator is not working and will quickly overcharge and destroy your new battery.

Posted on Jun 19, 2009

  • keith bowers Jun 20, 2009

    The relay you are hearing when you push the 'crank' switch is the starter solenoid--which is supposed to make the high current connection to the starter motor. THis narrows the problem possibilities.
    0) The wire to the solenoid coil is faulty, not allowing enough current for the solenoid to 'pull in' completely
    1) The contacts in the solenoid are faulty (either eroded away or dirty)
    2) The high current wiring from the battery positive terminal to the solenoid contacts is faulty
    3) The high current wiring from the solenoid contacts to the starter windings is faulty
    4) The starter is defective.



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