Battery & charger probs

[kryseric]

I leave my 2005 1200GS on a Canbus charger when not in use. I ride most weeks - to & from work (90mls round rip). However due to other work issues, I have not ridden it since the first week in Nov. Tried to start it last Sat - flat battery. (Canbus charger was displaying two green lights prior to disconnection).
Re connected Canbus charger - two red lights. Then green for power and red one for battery condition going off and back on at 10 second intervals. Left it for 12 hours. Two green lights. Started with a lazy battery turnover.
Found copper sulphate in underseat Canbus/BMW connection.
Cleaned connection and started again - Canbus shows one power geen light and a permenant red on battery condition. Later jumped to two greens again. GS Not used to commute - wrong time of year for flat battery after work. Two days later - no change in Canbus behaviour and still a lazy start.

Ideas GSERS please.

Moth

 

[John Armstrong]

Ditch the BM charger, buy another eg CTEK, fit the lead direct to the battery, job done.

Assuming the battery isn't dead. In which case, change battery then change the charger.

 

[davedyer]

Have you got anything wired to the back of the accessory socket? I've heard that an Autocom wired there can throw the canbus charger off.

 

[TyreMark]

I would also try connecting charger straight to battery (as per owners manual). I have the BMW charger and this worked for me re-charging a flagging battery. Now I just connect via the accessory socket as before.

 

[Wapping]

Have you got anything wired to the back of the accessory socket? I've heard that an Autocom wired there can throw the canbus charger off.

It can, for sure.

A friend with a 1200 GS had exactly that problem. There is a gizmo from Autocom to stop it.

My guess is that BuMW's 'smart' charger fools the Can-bus to stay open, instead of shutting down. This powers the Autocom (or the Autocom leaches power from the charger) which the system detects (quite rightly) as a drain on power, so it shuts everything down.

 

[FOGGY]

It can, for sure.

A friend with a 1200 GS had exactly that problem. There is a gizmo from Autocom to stop it.

My guess is that BuMW's 'smart' charger fools the Can-bus to stay open, instead of shutting down. This powers the Autocom (or the Autocom leaches power from the charger) which the system detects (quite rightly) as a drain on power, so it shuts everything down.

put a fuse in autocom wires. remove fuse to use charger via socket.

 

[John Armstrong]

A friend with a 1200 GS had exactly that problem. There is a gizmo from Autocom to stop it.

Never had a problem on either of mine when I used a powerlet plug on the correct side of the socket Though now I'd probably us a plug into the headstock socket to power the gps / autocom.

 

[kryseric]

Battery & Charger probs

Think I've sorted he job!
I have a direct socket for my Zummo wired through a centrex fuse panel. (This also has copper sulphat build up - now cleaned). Used the BMW Canbus charger through this. The charger started with a red battery condition light and went through the yellow condition lights to green overnight.

All my auxillary electrics (apart from my PIAA lights) including a starcom go through the fuse panel. The PIAA lights are direct battery feeds through relays fed from soldered trip wires to the low/high beam feeds.

Thanks for all the help. Ride safe.

Moth