F 250 4WD Pickup V8-7.3L DSL Turbo VIN K (1994)
If it has been determined that water, liquid or condensation has contaminated the diagnostic monitor, but not from any of the above sources, check the
following sources of contamination.
^
E.
Water leak at cowl weld seam.
^
F.
Water leak at windshield.
^
G.
Water/mud may have splashed into the monitor from the floormat or carpet.
^
H.
Liquid may have been spilled on the instrument panel (above the radio). The radio/keyless entry may also be affected.
^
I.
Water leak at the radio antenna grommet. The water will travel along the antenna lead, then drip onto the monitor.
If water/moisture has contaminated the diagnostic monitor, the source of the contamination must be identified. If the contamination is the result of a
water leak, water test the vehicle and repair the leak as required.
NOTE:
WHEN WATER TESTING THE VEHICLE FOR A WINDSHIELD OR COWL SEAM LEAK, THE WATER RUNNING OFF THE
WINDSHIELD MAY NOT CONTACT THE COWL SEAM. IF NO LEAK IS DETECTED AT THE WINDSHIELD, REMOVE THE COWL TOP
PANEL AND DIRECT THE WATER INTO THE COWL AND AT THE SEAM.
Check the following locations for shorts to ground:
^
A.
Check for damaged crash sensor wiring.
^
B.
Ohm out crash sensors (check for a short-to-ground).
NOTE:
ONE (1) SIDE OF THE SENSOR IS GROUNDED BY DESIGN. THE GRAY DIAGNOSTIC MONITOR HARNESS CONNECTOR CONTAINS
A SHORTING BAR INSIDE THE CONNECTOR THAT WILL SHORT PINS 2 AND 3 TOGETHER WHENEVER THE DIAGNOSTIC
MONITOR IS DISCONNECTED. SINCE PIN 3 IS GROUND, SHORTING PIN 2 TO 3 WILL CAUSE A SHORT-TO-GROUND IN ON BOTH
PINS 2 AND 17. ENSURE RED PLASTIC LOCKING WEDGE IS REMOVED FROM THE GRAY HARNESS CONNECTOR BEFORE
CHECKING RESISTANCE OF THESE CIRCUITS TO GROUND.
^
C.
Check for damaged shorting bars inside the gray diagnostic monitor connector.
^
D.
Check for damaged wiring (small nicks or cut) on the back side of the drive's air bag.
^
E.
Check the clockspring wiring down the steering column past the connector into the wire harness for damage.
^
F.
Check for damaged wire at fuse block mounting bracket.
^
G.
Check for chafed wiring at the clutch pedal return spring (if so equipped).
^
H.
Check for damaged wiring between the diagnostic monitor and the right cowl side. The wiring may have been damaged by the attaching screws
under the glove compartment.
^
I.
Check safing sensor wiring behind the RH kick panel for damage or signs that water may have entered the connector. A water leak at the radio
antenna grommet may result in water in the connector.
^
J.
Check the safing sensor wire harness under the RH scuff plate. Remove the harness from the trough and check for foreign objects such as sheet
metal screws, small pieces of metal or other sharp objects that may damage the wiring. The installation of running boards or similar equipment
along with the passenger door opening may result in damage to the wiring. Wiring may be damaged at the passenger's shoulder safety belt floor
anchor located to the rear of the scuff plate.
^
K.
Check the safing sensor wiring to the safing sensor at the sensor attaching bracket.
^
L.
Check for water entry into the safing sensor connector. Water leak at the rear window may result in water in the connector.
^
M.
Check the bulkhead connector for water or signs that water may have entered the connector and for loose or damaged pins or terminals.
^
N.
Wiring may be damaged at or behind the large aluminum reinforcement located under the instrument panel at the left cowl. There are three (3)
known locations the short may occur. They are: 1. At the base of the reinforcement - (inspect this area for damaged wire(s) which may be
visible without removing the reinforcement). 2. The wiring may be pinched behind the reinforcement (remove reinforcement). 3. The wiring
may have been pinched between the reinforcement and a bracket that is welded to the bulkhead.
