Ranger 4WD V6-3.0L VIN U (1997)
Four Wheel Drive Selector Switch: Testing and Inspection
A variable resistance switch that signals the generic electronic module (GEM) to operate the "Select Drive," Four-wheel drive system in 2WD, 4WD
High and 4WD Low range. The switch is checked as follows:
Measure resistance between Circuits 354 (GY/R) 465 (W/LG) using Rotunda 73 Digital Multimeter 105-R0051 (see diagram and table for terminal
location and resistance values).
Switch Resistance
OPEN - >8.8K ohms
Two-Wheel Drive - 8.7K to 2.0K ohms
4WD High/Auto - 1.9K to 700 ohms
4WD Low - 600 ohms to 150 ohms
Short to ground - <150 ohms
