the battery lite is on

20

Asked by Sep 27, 2016 at 10:06 AM about the 1994 Lexus LS 400 Base

Question type: Maintenance & Repair

The battery light is on in the dash I have had the alternator checked out it is
good 14V and had the battery checked and it is good.  So what the heck is
it???

2 Answers

26,555

Check the alternator belt tension. A tensioner is used so there is nothing to adjust but if it is loose the tensioner may be bad. Check the charging system without load and under load. You might still have a problem with the internal voltage regulator, I've seen them pass the freeby tests an auto parts store will do yet still be bad. Lastly and maybe most important, check all the connections and battery terminals are not loose or corroded, and not just at the battery but at the alternator too. You can check the following fuses as well, H–Fuse: ALT 120A, AM1 40A, AM2 30A, Fuse: ENG 7.5A, IGN 10A.

20

I have checked the alternator on the car the output is 14v I haven't figured out how to check the fuses cause I can not get them out of the fuse box

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