Machog

Interior light on, trunk light on. If its not alternator, there must be a very slow bleed down of the battery when the engine is not running.

Loose battery ground wire could be the cause. Alternator would check out OK, but battery wouldn't charge. Check both ends of the battery ground wire. Maybe a bad fuse or a fuse shorting could cause these symptoms?


Machog

509IS350

iTrader: (5)

Might be a bad battery. Go back and have them check it and get an exchange. I just replaced mine today. Got a Die Hard Gold with a 3 year free replacement. Piece of mind.

prpjewel

My 06 IS250 is currently dead also. I had the engine overheat suddenly on Sunday 1/13 and found radiator draining fluid on the ground. Pulled to the side and turned off engine. Sat ~30mins with only flashers on for tow. Initially the dash lights flashed but no start. Got it off the flatbed 7 miles later and nothing even lights up now. Will not jump, no lights, nothing. Hope you figure this one out for me too.

simba

I've had the same problem with my 08 IS250. I'll have the altenator checked and see if that'll fix it. Luckily I'm still under warranty.

mong

iTrader: (4)

take it to the dealer and let them test it cause when my car went dead and AAA gave me a jump.. they tested my battery/alternator. They said it was fine but I keep having giving myself a jump. Dealer tested.. they said battery cell was bad under load test. They just gave me a free battery cause I was still under warranty.

Proper 350

iTrader: (6)

Take it to autozone they have a different alternator tester. Tell them to check the diodes

mrjazz

I had a 2006 LS 430 and had the same problem with battery dying. Lexus replaced
battery 3 times. The last time it happened I told them to keep the car until they
solved the problem. After a week they discovered that the previous owner had installed a GPS device
and when they removed it they didn't disconnect at fuse box. No problems since.

Something to check out.

Cheers
mrjazz

carlos3366

you have a short.