4-66 4203781 First Edition
ELECTRICAL
4
Four Wheel Drive Circuit
Symptom: Four wheel drive solenoid does not energize.
Symptom: Four wheel drive solenoid does not energize when the 4WD switch is in reverse
position.
Symptom: Four wheel drive rev solenoid does not energize when the 4WD switch is in
reverse position.
Probable Cause Remedy
Tripped 10-amp circuit breaker (F6). Reset circuit breaker.
Faulty 4WD switch. Test 4WD switch. (See “4WD Switch Test” on page 4-81.)
Faulty reverse kick-out switch. Test reverse kick-out switch. (See “Micro Switches Test” on page 4-82.)
Faulty 4WD solenoid. Test 4WD solenoid. (See “Solenoids Test” on page 4-83.)
Faulty wire harness. Measure continuity between 10-amp circuit breaker (F6) and the 4WD switch. Continuity
must be indicated.
Measure continuity between the 4WD switch and the reverse kick-out switch (blu wire).
Continuity must be indicated.
Measure continuity between the reverse kick-out switch and the 4WD solenoid (grn wire).
Continuity must be indicated.
Measure continuity between ground and the 4WD solenoid ground terminal. Continuity
must be indicated.
Probable Cause Remedy
Faulty 4WD switch. Test 4WD switch. (See “4WD Switch Test” on page 4-81.)
Faulty wire harness. Measure continuity between the 4WD switch and the reverse kick-out switch (pur wire).
Continuity must be indicated.
Probable Cause Remedy
Faulty 4WD switch. Test 4WD switch. (See “4WD Switch Test” on page 4-81.)
Faulty 4WD rev solenoid. Test 4WD rev solenoid. (See “Solenoids Test” on page 4-83.)
Faulty wire harness. Measure continuity between the 4WD switch and the 4WD rev solenoid. Continuity must
be indicated.
Measure continuity between ground and the 4WD rev solenoid ground terminal.
Continuity must be indicated.
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