Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 999 / 749 > Blowing fuses - here we go again!

[HW]

Originally posted by antonye
Does yours have an alarm? Does it flash the indicators or toot the horn at all? It might be one of these that are faulty, and maybe the alarm tries to indicate that it is arming (by horn/flashers) and pop goes the fuse.

If it's an LED tail light, LEDs need to be wired the right way round and it might be this that is causing the problem. Normal bulbs don't matter.

If it was me, I would:

1. Get a load of spare fuses
2. Start the bike and watch for when it pops - try the brake light and indicators.
3. If it starts and it's still ok, switch it off and watch for it to pop - might be the alarm.
4. If it's still ok, try putting it on the steering lock or wiggling the bars around as it could be a loose wire/connector.

Hope this helps,

Ok .... trip to Halfords and bought up most of their stock of 20A fuses!

It seems that the LED stop light is the culprit - but ONLY if the engine happens to be running at the time. I can use either of the switches when engine is not running and the stop light functions fine. If the engine is running however, then either switch will blow the fuse first time the light operates (it does flash for a second then the fuse pops).

Half a dozen fuses down and my prognosis then is that there is something that doesn't like being vibrated in the rear light unit, so I will strip that down and check it.

Thanks for your advice, it helps to focus rather than the reaction of "oh my god that tends to overwhelm me when anything happens like this".