If that is the case, the auto amp is most likely to be faulty. Check through to see if you can come up with anything.
AUTO AMP. TERMINALS AND REFERENCE VALUE
INSPECTION OF AUTO AMP.
Measure voltage between each terminal and body ground by following "AUTO AMP. INSPECTION TABLE".
Fig. 34: Locating Auto Amplifier
Pin connector terminal layout
Fig. 35: Identifying Connector Layout
AUTO AMP. INSPECTION TABLE
Fig. 36: Auto Amplifier Connector Inspection Table (1 Of 2)
Fig. 37: Auto Amplifier Connector Inspection Table (2 Of 2)
Monday, December 13th, 2010 AT 12:15 PM