2020 Ryker overheating

[chris56]

I can understand the headlight time delay relay "hanging up" allowing the lights to remain on, but fail to understand how charging the battery, when "disconnected from all other wires", could affect a mechanically operated coolant thermostat within the cooling system.
Is the thermostat reference perhaps to the fan on/off thermostat, which if failed open, would prevent fan operation?
If not (and unrelated to the battery condition), the coolant thermostat failed closed/partly closed, and the resultant heat/pressure expanded the radiator, maybe that is a possibility.

I think there was something else not correct - maybe the cables or the Relais .. a (Bosch-) sensor normally makes no problems ..

 

[Chubbin]

Yeah I the expand comment was mentioned when he told me but I forgot until someone said it. The only thing i can think of is when i put the wires back on maybe one of them wasn't tight or was just barely touching and shorted out the thermo? I can only guess but all I know is the radiator is new because the old one had a couple bug "dents" in the grill part of it and it looks brand new .. no discoloring dirt or anything on it. I also noticed the reservoir is also new. not sure why that would need to be replaced unless something was wrong with it too.