Audiovox MM850 manual Troubleshooting

Installation Guide

Negative Switched Dome lighting

To 3 pin	Red / black - Lamp on
connector	Black / red - Lamp common
	Violet / brown - Lamp Auto

To

constant

Factory Dome light circuit

To

constant

Factory Door ajar switch or Body

Troubleshooting:

SYMPTOM:	REMEDY:
No power at Video Monitor	-Verify +12 VDC on Red wire at 2 pin Power Harness behind video
	monitor. Verify ground connection with continuity test from known
	good ground to black wire at 2 pin Power Harness
Power but no video or	-Verify that the correct source is selected (i.e.: 1 or 2). Verify that the
sound	source is on and playing a known good media (such as a videotape).
	Verify connections at both ends of the source component harness.
Picture, but no sound	-Verify that the headphones are turned on; check headphone batter-
	ies
	-Verify that power is available to the FM Modulator; make sure modu-
	lator is tuned to the correct FM station

10