NO POWER!?! VF700F 85'

Discussion in '1st & 2nd Generation 1983-1989' started by Jimbob, Mar 25, 2019.

  1. Jimbob

    Jimbob New Member

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    Hi all just getting around to starting the bike up for the first time and I have a battery/power problem. I replaced the de-ionised water and charged the battery, all good showing 12.5V and have a tester that says the battery is good. I started with the little things like indicators/headlight, brake light, etc... Then I went for the biggy, pushed the start button.... click, everything went dead.

    Turned the bike off and then on... Dead
    Checked the fuse box and the relay, all ok
    Disconnected the battery, checked charge - ok
    Stuck Battery on trickle charge for 48 hours, reconnected - 12.4V
    Turned the key - nothing.

    I've been multi-metering everything going but don't seem to know what is going on. are there any extra fuses im missing that might have blown? The one in the starter solenoid is good as are the 6/7 by the key...

    Ideas on a postcard please - might try another battery just for fun.
     
  2. Captain 80s

    Captain 80s Insider

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    Because you didn't specifically say you checked the main fuse... did you check the main fuse?
    It's located on the relay. On the 85 it should be a blade style 30 amp.
     
  3. Jimbob

    Jimbob New Member

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    Yep, one of the first things I tried. Its not a blade fuse, its like a flat inline piece of metal.

    thanks for the reply
     
  4. Captain 80s

    Captain 80s Insider

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    on a 85? Weird. Try another battery for giggles. Or connect a car battery (not running).
    And did you pull out the fuse and inspect?

    Also put ignition switch in "Park" and see if you have taillight.
     
  5. Jimbob

    Jimbob New Member

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    I have a spare car batt that's charged - that was my next step. Give it a little bump.

    Other than that im thinking something may have grounded somewhere?
     
  6. sixdog

    sixdog New Member

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    Did the battery tester test for amperage? Also double check all the connectors from the handlebar switches , fuse block and ignition switch ( don't ask ) :)
     
  7. Jimbob

    Jimbob New Member

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    Does not give me a read out -just states "battery good". I was a little concerned about the controls on the handle bars, but up until everything went dead the controls seemed to work fine.

    will do some more testing and report back
     
  8. bk94si

    bk94si Insider

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    Check and clean the grounds and check the position of the kill switch.
     
  9. Jimbob

    Jimbob New Member

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    Would the kill switch stop the dash lights working?
     
  10. Captain 80s

    Captain 80s Insider

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    No.
     
  11. Captain 80s

    Captain 80s Insider

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    Did you check for a tail light in the "park" position?
     
  12. jeremyr62

    jeremyr62 New Member

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    When you say you replaced the deionised water, I am assuming you mean topped up. The electrolyte is sulphuric acid and you cannot just replace it.
     
  13. Jimbob

    Jimbob New Member

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    Yep :)

    Im thinking the battery has had it. Also I noticed that if I "jiggle the key" the voltage shoots up and down.

    Just purchased a new battery and ignition barrel, oh well
     
  14. Jimbob

    Jimbob New Member

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    Ok, doing my head in now.

    New Yuasa Battery
    New starter solenoid
    New bulbs
    New ignition barrel

    Still no power 12V at solenoid when off, 0v at solenoid when on, no power anywhere when on position. Checked all earths...

    Fire time?!
     
  15. Captain 80s

    Captain 80s Insider

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    When you say "ignition barrel", do you mean a whole new unit?
     
  16. Jimbob

    Jimbob New Member

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    Yep, key, barrel, wiring
     
  17. Captain 80s

    Captain 80s Insider

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    Hot wire the bike to eliminate the low likely hood it could still be that. Harness side connect the Black and Black/Red with a jumper.
    Just a sanity check.
     
  18. squirrelman#1

    squirrelman#1 New Member

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    it's possible to remove the lower, switch part from the barrel assembly and clean the contacts before you proceed to inspect/clean contacts in the plug between ign switch and wiring harness.
     
  19. Jimbob

    Jimbob New Member

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    Fixed it.....

    You'll laugh....

    Newly Powder-coated frame = rubbish earth!!! I'm an idiot!
     
  20. Captain 80s

    Captain 80s Insider

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