10.5
ELECTRICAL
10
Differential Solenoid Circuit Operation
The rear differential solenoid relay is located under the hood.
Power is present at the AWD / 2WD / Turf Switch when the
ignition key is turned “ON”.
When the switch is pushed to activate “Turf” mode, power is
sent from the AWD / 2WD / Turf Switch to the ECU.
Depending on vehicle speed, gear position criteria and parking
brake input, the ECU provides a ground path for the Rear Diff
Solenoid Relay allowing it to enable the differential solenoid.
NOTE: The Rear Differential will not unlock if the parking
brake is set.
If the rear carrier fails to switch from operational modes:
• Check the connector located under the left rear fender.
Look for loose wires or bad connections.
• Check for power from the connector, to ensure the
solenoid has power to be activated.
• Check the AWD / 2WD / TURF Switch wires for loose
connections.
• Remove solenoid from carrier and ensure the solenoid
plunger is actuating.
Brake Light Switch
1. The brake light switch is located near the steering gearbox
along the frame. The brake pressure switch is installed into
this block.
2. Disconnect wire harness from switch.
3. Connect an ohmmeter across switch contacts. Reading
should be infinite (OL).
4. Apply foot brake and check for continuity between switch
contacts. If there is no continuity or greater than .5 ohms
resistance when the brake is applied with slight pressure,
first clean the switch contacts and re-test. Replace switch
if necessary.
Rear Differential Solenoid Circuit
CAUTION
Do not power the solenoid with 12 Volts for more
than 1 second, or damage may occur
to the solenoid.
Brake Switch
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