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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 11-04-2012, 02:33 PM   #1 (permalink)
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Angry No Electics

I was going for a ride, turn the key hit the start button and it clicked. No lights, no nothing. Pulled battery, which is fairly new, checked the voltage and had 12.4. Cleaned the terminals and placed battery back in bike, turn key and still no lights. Checked earth ground and all the fuses. My guess is the ignition switch may have failed. I have checked the red and red white and have 12 volts there. Any thing else should I check.
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Old 11-04-2012, 03:31 PM   #2 (permalink)
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At 12.4 volts the battery is about 75% charged. A good battery should read at least 12.6 volts even after being unused for several days.

If you have an EFI bike and been on the forum regularly you would have read about the start voltage threshold problem. This means that below a certain voltage level the ECU prevents you from starting the engine.

Coincidentally the main thread dealing with that has been brought up again today, it's here:

http://www.triumphrat.net/twins-tech...y-problem.html

When you say you have no lights, do you mean the headlight or the warning lights?. Did they go out after that first "click"?. That's usually a symptom of loose battery terminals.

Try recharging the battery for a few hours and tighten the terminals.

Last edited by Forchetto; 11-04-2012 at 03:38 PM.
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Old 11-04-2012, 03:52 PM   #3 (permalink)
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I just got on the bike, turn the key, and hit the star button. Heard a click, sort of sound like a bad connection. Bike had set for about 2 weeks and I have been starting and running once a week when not riding it. When I turn the key on I have no lights at all, blinkers and horn don't work, nothing. Someone suggested the headlight relay from another site that I posted on.
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Old 11-04-2012, 04:03 PM   #4 (permalink)
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Quote:
Originally Posted by Jcb986 View Post
Someone suggested the headlight relay from another site that I posted on.
You can bypass the starter or headlight relay as shown on the photo but even it it was faulty the rest of the electrics would work OK. You have checked the main 30 amp fuses number 2 and 11?:

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Old 11-04-2012, 04:45 PM   #5 (permalink)
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Yes, all fuses are ok, even checked the earth ground, weird. You think it's the ignition switch.
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Old 11-04-2012, 04:58 PM   #6 (permalink)
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Assuming the ignition switch contact arrangement is the same as on other Bonnies they can be tested as shown on the photo below. Locate the connectors inside the headlamp shell and using an ohmmeter or continuity tester proceed as per photo.

We have had a few burned out switches, here're some threads showing damaged contacts:

http://www.triumphrat.net/twins-tech...k-blowing.html

http://www.triumphrat.net/twins-tech...-2008-efi.html

http://www.triumphrat.net/twins-tech...gn-switch.html

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Old 11-04-2012, 05:11 PM   #7 (permalink)
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I decided to try the jump, nothing. I also checked the current from the ignition switch at the harness. RY and RW had 12.4 volts, nothing on the wires. Turned key on those same wires showed no voltage, plus the other wires showed no voltage.

Tried your diagram got no volts or ohm readings. Where a good place to get one reasonable?

Last edited by Jcb986; 11-04-2012 at 05:51 PM.
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Old 11-04-2012, 07:12 PM   #8 (permalink)
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Took the switch out and it was just like new. Going the have battery tested tomorrow even though it reads 12.4 volts.
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Old 11-04-2012, 07:26 PM   #9 (permalink)
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It's the battery. I'd bet on it. Always suspect the battery first.
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Old 11-05-2012, 04:41 AM   #10 (permalink)
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If you've been starting the bike up but not riding it, you've probably flattened the battery.
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