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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 11-02-2012, 05:01 PM   #1 (permalink)
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790 carb bonneville starting problem

Full charge in battery, kickstand up or down,transmission in neutral, clutch lever pulled in to grip; turn on the key and the lights all come on, hit the starter button and nothing happens. No clicking, no cranking, no grinding, nothing at all - as if the starter button is not connected to anything. I opened the headlight shell and visually checked all wire connections, and visually checked the wire connections to the starter realy, solenoid, and every other connector that I could find. The fuses are all OK. I know I'm missing something relatively simple here but I have reached the outer limits of my pitiful diagnostic abilities.
If you have any suggestions please type slowly and use small words so that I can understand.
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Old 11-02-2012, 05:38 PM   #2 (permalink)
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Kill switch?

If you're using the original battery, replace it.

Check the starter button. If it's not making proper contact or the wiring to it is compromised, there's your problem.

Does the headlight turn off when you press the starter button? If not, try replacing the starter relay.

Check continuity in the clutch switch and especially the side stand switch. Is the neutral light on?
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Old 11-02-2012, 06:24 PM   #3 (permalink)
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check fuse again it might look ok but could be faulty ...had similar situation recently fuse looked ok but it wasn't...
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Old 11-03-2012, 01:00 PM   #4 (permalink)
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Quote:
Originally Posted by Baltobonneville View Post
Kill switch?

If you're using the original battery, replace it.
Battery is brand new and fully charged.

Check the starter button. If it's not making proper contact or the wiring to it is compromised, there's your problem.
All wiring to the starter button appears firmly connected and undamaged.

Does the headlight turn off when you press the starter button? If not, try replacing the starter relay.
Headlight stays on and does not dim at all when starter button is pressed.

Check continuity in the clutch switch and especially the side stand switch. Is the neutral light on?
Neutral light is on. Not sure how to check continuity but all wiring to and from the clutch and the side stand switch appear firmly connected and undamaged.
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Old 11-03-2012, 04:33 PM   #5 (permalink)
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Sometimes the contacts in the starter button get dirty. Spray a little wd40 in the and see if that helps. Also, you can use car jumper cables. Hook to your car battery. Black goes to frame, red to starter side of solenoid. Good luck.
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Old 11-03-2012, 05:06 PM   #6 (permalink)
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Does it have a clutch safety switch?. Check that:

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