'89 NA auto supra. when it cranks it starts otherwise the car will just click like the battery is dead. the problem started gradually a couple onths ago. since the issue i removed the amps and subs, replaced the battery and battery terminals. the new battery was good for 2 1/2 weeks and needs to be jump started once a day just like the old one. my 75 amp jump starter works every time and the battery has been charged twice in the last 2 months! had the alternator checked out on and off the car and no voltage/amp issues were found. the drive belt is also brand new and does not appear to slip. i would have replaced the starter but since the issue is affecting the battery i am not going to spend all day removing the intake or lifting the motor to get the damn thing out without a good reason. i have checked all my lights and nothing visibly remains on except for the stock alarm light. so far i have been disconnecting the negaitve terminal while at work which has helped BUT sucks because it rains almost every freakin day. i even checked/cleaned some grounds to the block and chassis but from there i am out of options. has anyone run into this issue for these cars? what else can i do?

 

Its definitely the alarm. I had plenty of issues with my other Supra when I had it, and thats what it was. To reset the alarm on these cars, cycle the key a few times in the passenger door. Thats all I can say..it sounds like the car thinks its being stolen

 

interesting.... so why would jump starting make it work? wouldn't the horn and headlights go ape shit too? (i set it off every few months to make sure it still works)