lanceMo

Standard Bore
Joined
Jul 12, 2025
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Ride
Rocket 3
Hey all I just bought my 2009 Rocket 3. Accidentally left the key turned on for 3 hours after I shut it off. Tried jump starting it but it wouldn't take it. Took the battery out and had it tested. Got a new battery and it started up just fine. Rode it for about 20 minutes to the store. Came out, rode it home. Next morning went to go to work and it was dead. No lights no start up cycle nothing. Tested battery still good. Checked the ground to the starter, good. There's no power to the kill switch, checked that. I'm thinking its an ignition switch problem?
 
Try wiggling the harness to the switch and see if it powers up. A bad switch IS a common issue with the earlier model bikes. If that turns out to be the issue, this may be of help...

p.s. while you're at it you should make, or buy (Eastern Beaver for Triumph Rocket), a system to bypass the issue with full current going to the switch- that burns them out

 
The 2004 to 2010 model years had the hreadlight power routed through the ignition barrel. The 55 watt draw of the headlights overheated the solder joints inside the ignition barrel and desoldered the joints, making for problems getting the bike to start or run. The factory corrected the problem for the 2010 model year and beyond so it's possible your ignition barrel has become desoldered if a headlight bypass wasn't installed. As Journeyman points out Eastern Beaver sells a relay bypass kit the allows you to bypass the headlight power from the ignition barrel and power them directly off the battery thru a relay. The kit retains the switch functionality on the handlebars so it won't affect dip switch operation (high/low beam switch). One added benefit is Eastern Beaver offered a low beam cutout switch (toggle) that allowed you to turn the low beams off before you turned the igniton on (usually the low beams are on when the ignition switch is placed in ON). During cold weather that was handy as all the available cranking power was available at startup since the headlights don't come on when the switch is toggled, you just have to remember to toggle them back on before you take off. You'll also find the headlights are noticably brighter since the power isn't routed through small wires that overheat.
 
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