So i just picked up a gs400 the other day and everything was fine until today my lights on my dash are dimly flashing and same with the speedometer and odometer, its flashing intermittently, also my alarm isnt working now, today i also had trouble putting the car in drive from reverse, it was stuck and wouldnt go into gear, i shut the car off and turned it back on then all was fine.... I cleaned the battery terminals and the battery is from 1/11 it says, the car starts up with no problems at all, i might of left my lights on last night for 2 hours cause i looked outside and my lights were on, it started to do this after last night, need a new battery?

 

It sounds like your alternator!

 

lately sounds like a lot of alternator problems on here, im even having problems with mine haha.