E53 ABS ASC DSC lights...need some advice

[aurimas]

Now i went to test and it shows 12.6v before start after starting with a/c on it gave me 13.80v

[jdstrickland]

Originally Posted by aurimas

Now i went to test and it shows 12.6v before start after starting with a/c on it gave me 13.80v

Your running voltage is about 0.5v low. You should see 14.4v.

[wpoll]

Originally Posted by jdstrickland

Your running voltage is about 0.5v low. You should see 14.4v.

This can depend on how you measure it. I get 13.8v on the unlocked BC display but 14.3v on the jump terminals with a Fluke. Seems my BC reads about 0.5v low.