4TR Adjustment

[Brent Kasl <kasl100@navix.net>]

Based on the S5 manual, the 4TR units are adjustable when the alternator 
if failing to output full voltage. I am going to have our alt checked, 
as it is putting out only 12 volts when the book says it should be near 
14.4, and the alt light will not go out. I have an aftermarket  new 4TR 
unit that is not adjustable on the back to vary output. What is the 
process if this is not adjustable? Brent