Test K: Low to High (Clockwise)/High to Low (Counterclockwise) Relay Circuitry Functional Test

Pinpoint Test K: Low to iligh (Clockwise)/High to Low (Counterclockwise) Relay Circuitry Functional Test

Normal Operation

When the low to high shift occurs circuit 782 (BR/WH) provides the 4X4 control module-switched ground path for the clockwise rotation relay. While the low to high (clockwise) relay is energized circuit 777 (YE) sends battery voltage from the battery junction box (BJB) fuse 3 (30A) and circuit 704 (DG/LG). Circuit 778 (OG) provides ground for the transfer case shift motor to operate in the clockwise direction. When the high to low shift occurs circuit 781 (OGIB) provides the 4X4 control module-switched ground path for the counterclockwise rotation relay. While the high to low counterclockwise relay is energized circuit 778 (OG) sends battery voltage from the battery junction box (BIB) fuse 3 (30A) and circuit 704 (DG/LG). Circuit 777 (Y) provides ground for the transfer case shift motor to operate in the counterclockwise direction.

Possible Causes

^ Battery junction box fuse 3 (30A)
^ Circuits:

^ 704 (DG/LG)
^ 57a(BK)
^ 57b (BK)
^ 777 (YE)
^ 778 (OG)
^ 781 (OGIB)
^ 782 (BN/WH)

Low to high (clockwise) relay

High to low (counterclockwise) relay

PINPOINT TEST K: LOW TO HIGH (CLOCKWISE)IHIGH TO LOW (COUNTERCLOCKWISE) RELAY CIRCUITRY FUNCTIONAL TEST