acenase

For some reason when I don't start my car for like 4-5 days my car is completely dead. I always have to jump start it. I am going on a trip for a few days and was wondering if I disconnected the negative terminal, will this be ok? Or will I need to disconnect both positive & negative terminals so my battery doesn't drain? I don't know what is causing my battery to drain for not starting it for a few days as I don't have sounds or anything. But just wondering i f just disconnected the negative terminal would do?

snsrushing

I have the same car (92 SC400) and I'm having the same problem. I think its the alternator going out. I just installed a fresh battery Sat. and by Tue it was dead. I took it out Sat. for about 20-30 on the freeway and side streets. I might swing by a parts store and see if they will do the free electronic diag.

Ursus

it would 1 erase all your radio stations. and 2 reset your ecu. It isnt too bad the car just has to "relearn" your driving habits especially if your engine is a vvti model.

Mashie

i am having the same problem, i still havent been able to figure it out whats causing the drain. i checked all the ground and etc. but the thing is that my alternator is good and bad at the same time. the good is that its holding at 14+ volts but the amperage is at 40 and it would drop. from my understanding that the amperage is suppose to be at 50-60. so i think the alternator might need to replace but the thing is that i am not sure if it is possible that the alternator can drain the battery while the car is not on. anyone for any idea for this?

mitsuguy

iTrader: (2)

it will work temporarily, but you really need to find the source of the problem...

You only need to disconnect the ground...

RTIS250

iTrader: (9)

Typically a bad alternator isnt going to drain your battery when the car is off. I would be looking for voltage draws.. you likely have something staying on.. maybe a bad ECU somewhere not turning off, or stereo equipment not wired properly..