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Port 4 is connected to the enable solenoid on the tractor.
2. Find the 40-pin Deutsch connector on the tractor rear side(Different location for
different vehicles)
3. Open the hood by pulling on the latch and lifting on the handle located at the
front of the hood. Route the black 2-pin Deutsch enable solenoid connector on
the Interface. Cable under the right side of the cab up to the factory steering
valve where the enable solenoid is located.