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post #1 of 20 (permalink) Old 03-20-2017, 11:16 PM Thread Starter
Minitwins
Main Motorcycle: Ducati 900ss 1978
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No spark

Hi Folks, I removed the battery on my TR7RV to clean it up, top up fluids etc.

When I tried reconnecting it both the pos and neg terminals sparked and got real hot. Short! After a bit of fiddling around I found the short. Pos and Neg wires coming from the battery right where they go into some heat shrink had worn and were touching. Taped them up job done, I thought. Not I have no spark. Any suggestions where to go from here?

Michael.
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post #2 of 20 (permalink) Old 03-21-2017, 12:50 AM
Rev
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Fuse ?

I don't believe no 5 pistoleros could do in Josey Wales.
Boys, this here is English Bob,the Duck of Death. Heard you was dead Little Bill. Hell I heard that too, thought I was dead myself, turns out I was just in Nebraska...
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post #3 of 20 (permalink) Old 03-21-2017, 03:19 AM
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There should be no damage apart from possible battery damage but as Rev describes, the fuse is the first place to look as it will be popped.

Now,where did that bit fall off ?
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post #4 of 20 (permalink) Old 03-21-2017, 05:34 AM Thread Starter
Minitwins
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Fuse survived the entire ordeal, I changed it just in case. hmmmmm
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post #5 of 20 (permalink) Old 03-21-2017, 07:12 AM
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Check you have not burned right through a wire then.

Now,where did that bit fall off ?
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post #6 of 20 (permalink) Old 03-21-2017, 02:21 PM
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Main Motorcycle: 1973 Triumph TR7RV
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Hi mwoodtr7, Are the warning lights coming on when you turn on key?

What are you using for ignition system?
Don
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post #7 of 20 (permalink) Old 03-21-2017, 07:02 PM
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You now need to check battery voltage as the short circuit may have ruined the battery,or at least,discharged it.If that short circuit has not blown a fuse,the battery might have been really discharged anyway.You will not get a spark if a Boyer is fitted with a flat bike battery.
I expect this will be an easy problem to solve.

Now,where did that bit fall off ?
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post #8 of 20 (permalink) Old 03-21-2017, 10:26 PM Thread Starter
Minitwins
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OK, thanks for the tips, I've got a tri spark ignition. All lights work fine. I'll try another battery
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post #9 of 20 (permalink) Old 03-22-2017, 03:29 AM
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So you have power to the bike's electrical system now. Do you have access to a volt meter? If so what is battery volts at terminals key off? What is it key on?

Key off fully charged battery will be very close to 12.6v. Key on with headlamps off will be close to 12.2-12.4v.

If your down in the 10.5-11v range that is no good & some electronic ignitions won't spark then. Since you had a short your battery may just need a recharge. If bike was running good prior it may just need recharge & still be ok.

Remove or disconnect battery during recharge to prevent over heating zener diode.

Also do an inch by inch visual inspection of all the wiring as you may have other problems there. Tug on the wires to all the connectors to make sure they are in tight. If battery is good/replaced & all else seems good, you need a voltmeter to test the ignition system.
Don
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post #10 of 20 (permalink) Old 03-23-2017, 01:24 AM Thread Starter
Minitwins
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Thanks folks, battery was the problem, back on the road now!
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