Hello,

On a 16197427, does anyone know the max continuous input/operating voltage?

If I remember correctly anything over 17 volts throws a code but I can't seem to find any info on what the ECM is safe to operate at.

I've got an '89 C2500 5.7L TH400 that I changed to a '7427 about a year ago.

The battery is a lithium titanate with a max charging voltage of 16.8V.

And I have two amps that will go into protect mode at 16v so I need to keep it under that.

Any info is much appreciated.

Thank you