Instrument Panel, Gauges and Warning Indicators: Testing and Inspection
FAULT DIAGNOSIS HINTS1. Check that fuse 29 is intact and supplied with current.
2. Check that current is present on pin 7 of the rheostat.
3. Check that a pulse width modulation signal is present on pins 2, 3, 5 and 9 of the rheostat and that the electrical connections and grounding of every component are satisfactory.