Weird battery light issue - Club Lexus Forums

Log In 

Weird battery light issue

Reply
 
 
 
Thread Tools Search this Thread
Old 01-09-16, 04:53 AM   #1
UNCJD
Rookie
Thread Starter
 
Join Date: Aug 2015
Location: North Carolina
Posts: 71
Default Weird battery light issue

Battery light came on in my '95 LS400 while driving down the highway. Battery tested ok, but autozone said alternator wasnt charging. This was a new alternator, so i pulled it out and brought it back. Bench tested fine
So I put it back in. There had been a PS leak, so I fixed that. Found a loose connection at the 120A fusible link, so I tightened it. All fuses check out OK.
Battery light's still on.
Everything on the alternator is tight and the connections were reinstalled with dielectric grease. I haven't recently jumped it or been monkeying with the electrical system. Any ideas as to what I should check? Should I idle it a while and see if the light goes out on its own?
UNCJD is offline   Reply With Quote
Old 01-09-16, 03:43 PM   #2
oldskewel
Pole Position
iTrader: (1)
 
Join Date: Sep 2010
Location: CA
Posts: 288
Default

I would not trust the Autozone bench test results.

I once had a bad alternator test good at our local Pep Boys, that was actually bad - although I was not sure of it until putting the new one made everything good.

It's a problem if you're needing to rely on a bad bench test to prove for warranty purposes.

I would get a voltmeter and measure voltage at the battery when the car is off / idling / revved at 2500 RPM. That should tell you more.
oldskewel is offline   Reply With Quote
Old 01-09-16, 07:00 PM   #3
UNCJD
Rookie
Thread Starter
 
Join Date: Aug 2015
Location: North Carolina
Posts: 71
Default

Quote:
Originally Posted by oldskewel View Post
I would not trust the Autozone bench test results.

I once had a bad alternator test good at our local Pep Boys, that was actually bad - although I was not sure of it until putting the new one made everything good.

It's a problem if you're needing to rely on a bad bench test to prove for warranty purposes.

I would get a voltmeter and measure voltage at the battery when the car is off / idling / revved at 2500 RPM. That should tell you more.
The alternator is definitely a player here. I thought I had it fixed, but it started doing this Exorcist crap out on the road like it did when the last alternator went bad. Checked under the car after dinner and what do you know...a new PS leak. Or a failed repair on the old one. What drives me nuts is, that's a new PS pump!
UNCJD is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Alternator charging voltage nmnunna32 RX - 3rd Gen (2010-2015) 4 10-15-15 05:06 AM
Battery light wont go off after replacing alternator pigtail and alternator. TRENTIMUS GS - 1st Gen (1993-1997) 1 09-15-15 08:22 AM
95 SC300 Battery/Alternator Problem drareg Performance & Maintenance 0 07-31-15 12:06 AM
battery charging problem need help asap chucksc400 SC- 1st Gen (1992-2000) 3 03-23-15 03:23 PM
CEL, Excessive Ripple & headlight leveler warning light lexus4us RX - 1st Gen (1999-2003) 6 09-03-14 04:13 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -7. The time now is 11:56 PM.


Copyright © 2000-2016 Internet Brands, Inc. All Rights Reserved