1150gsa possible alternator problem?

Green Boy

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(1150gsa '04 approx 44k miles)

Hi all,

After some advice on an electrical problem based on the following:

Over the last week I've noticed that when riding the bike in the dark, the speedo illumination starts bright and begins to fade slightly over about 20 mins whilst the rev counter appears fine. Didn't think much of it until I noticed this morning that the clock was off although when i started the bike (started first time), it came back on albiet reset. The lights and the rest of the controls appeared to be fine but when I parked at the station (abotu 10 mins away) and switched the ignition off, the clock went off after about a second.

So other background:

  1. The bike is connected to an optimate overnight as the bike is used most days for a 10 mins commute to station and longer motorway blasts of about 30 mins a couple of times a week
  2. I replaced the battery with an OEM one approximately 2 years ago
  3. The alternator belt was in good condition approximately 6 month's ago when I check during a service
  4. The alternator is the original

Whilst I'm not obsession about it, I do try to keep the bike in good nick and haven't noticed and trapped, damaged or decayed wiring etc.

My initial thought was a fault with the alternator or a battery problem but thought an OEM battery should last more than 2 years. I must say that at this point I haven't had the chance to get out the multimeter to check battery voltages etc. Has anyone had a similar problem or any other ideas?

Thanks.
 
Your clock resetting problem is usually due to fuse 3 blowing.
 
When my original battery was 2½ years old I had similar problems which escalated to non starting on occasion. It turned out to be a loose battery/cable connection.

Cleaned, tightened, greased and all was good, plus the battery lasted another 7 years without problems.
 
If it is a charging problem, wouldn't all the lights dim. Not just the one for the speedo? Could it be a bad connection caused by something warming up. I would take the bulb out, give the connectors a clean and check earth points.
 
If it is a charging problem, wouldn't all the lights dim. Not just the one for the speedo? Could it be a bad connection caused by something warming up. I would take the bulb out, give the connectors a clean and check earth points.

That's a fair point - will check.

:thumb2

Btw and in case anyone needs a wake up on a Tuesday afternoon, the cost of a new alternator from Motorworks is... £524 :eek:
 
Neil - thanks for the offer and will bear that in mind. You were right about the blown fuse!

Will check out the speedo light connection this weekend.

Thanks for everyone's thoughts and advice

:thumb
 


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