Electrics shutdown when I press start button

[Giles]

A while ago I got caught in a thunderstorm on my 2007 R1200 RT (a little hail just for fun) and when I got home I failed to shut the ignition down. When I went to go for a ride a week later the battery (lithium ion) was completely dead and would not accept a charge. After replacing the battery everything appears to work correctly until I press the start button, then everything shuts down. Power will come back up if I disconnect and reconnect the battery, but everything shuts down again when I press start. I have checked the OBD and there are no trouble codes set. I would very much appreciate any ideas as to what could be wrong or checks I can run.

[yorkie]

Sounds to me like a dead battery. Just because it's new doesn't mean it will be fully charged.
Hopefully it's that simple

[Giles]

Hi, thank you for your response. I charged the battery before using and it reads a full 13.8 volts. Any other thoughts?

[Peter Baker]

Everything shutting down when you press the start button could be dodgy switch gear - has been known:-). If it was switch gear, normally turning the ignition off and on again would be enough, so that is a bit confusing! It is weird you need to disconnect the battery to get it to come on again... Unless doing so fixes a poor earth connection or something simply through the movement of cables? I don't know enough about lithium ion batteries in old bikes, but did you have an old lead-acid battery you could test? Peter

[jclaudej]

Hi,

Perhaps a short circuit starter. When you turn the contact on, does the road light come on ?
If yes, I will verify the starter circuit .

Good luke

[Giles]

Hi,
Thank you for the responses. The running lights come on when I turn on the ignition switch, but after pressing the button to crank the engine there is just a click and everything shuts down. Turning the ignition switch off and back on will not reset it. It only resets (turns on instrument panel and running lights) when I disconnect and reconnect the battery. Do you still think this sounds like the starter circuitry? I am reluctant to strip off all the bodywork to start testing circuits if it is probably in the switch gear. Your suggestions are greatly appreciated, thank you.
Best regards,
Giles

[David.]

After pressing the button to crank the engine there is just a click.

Where is the "click" coming from.

[Doctor T]

Have you tried a drop test on the battery?. Your battery may be showing 13,8v but your type of battery is known for a cell that does not fully charge. The cells may need syncing. You need a special charger to do this. Look on YT there is a few videos with people that had problems with their batteries and how to fix them.

[Sullivj]

Are you certain that the battery and cables are making a good connection?

[jclaudej]

As already explained, I think that the "clic" is the starter relay. And after they are two possibility :
1 - Battery dead or bad connexion look at the connectors
2 - Starter relay death (the contact is bad but the coil is OK)

Good luke

[David.]

The starter relay is under the seat and the solenoid is part of the starter motor.

[jclaudej]

The starter relay is under the seat and the solenoid is part of the starter motor.

Hi
When you push on start buton, to try to find where come the "clic"
solenoid of starter ?
It not, you can test your battery with => https://fr.aliexpress.com/item/10050055 ... pt=glo2fra
This product contrl the internal resistor of your battery and give you a clear information about the health of your battery.
After, if you hear that is the solenoid of the starter, I thing that origin of your default is the starter but before to change it try to repare it.
In my country, I can find electric motor repairer who is able to find a solution perhaps without spend a lot of money.

[michaelc2710]

You can put your test meter on the battery and read the voltage, leave it connected and press the start button.
If the battery has a dead cell the meter will drop to single figures and stay there when you hear the click. Take your finger of the start button and see how long it takes the battery to recover back to it's start voltage.

The other thing I'd try after that is just a set of jump leads from either another battery or car (don't have the car running) and see if the bike fires up straight away.

These are simple things to check prior to taking all the plastics off or the switch gear apart.