Is my alternator going bad again?
 

Hi,

I had my alternator changed half a year ago along with a new battery. In the present I see the shift indicator light (D) in the dash dim and back to normal at the same time and rythm as the turn signal lights in the dash. I noticed also that when I play around with my windows the same happens to the (D) light as well. Any advice will be greatly appreciated. Thanks.

I had the same problem on my 91 4runner (i know it's not a Lexus, but same company overall). Everytime i would roll the windows up or down with the headlights on, the would dim while I had the button down or up. The same thing goes for the signal lights. However, the altenator did not give out right away. If I remember correctly, it lasted another month or so. I'd have it checked out.

make sure your battery posts are clean and the cable connectors are snug.

hey , im having exactly the same problem and i waited a week for my mechanic to check today and now have to wait till friday this happens to when i first step on the brake a few times on a cold engine start all eletrical will dim but then come back on i know i need a new battery ,BUT DO YOU THINK I NEED A NEW ALTERNATOR?:cry:

although i only drive the ls twice on weekdays and on weekends cuz hell gas is $3.45 and the ls needs work to get the mpg up in the high teens and 20's and im only bout 2 miles from my school........gotta use the goood ol' two feet:)

Check the alt is not contaminated with oil, it should be bone dry. You may have a PAS leak from the reservoir O ring. It's a cheap fix and plenty on my previous posts on how to do it.

hey bigste

i will check this, thanks for the heads up