F 350 2WD Super Duty V10-6.8L (2009)
Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) supplies voltage to the demand lamps on circuit CLN09 (YE/GN). The demand lamps are grounded through circuit
GD115 (BK/GY), GD122 (BK) or GD179 (BK/VT).
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
SJB
PINPOINT TEST E: THE DEMAND LAMPS ARE INOPERATIVE
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
-------------------------------------------------
E1 CHECK CIRCUIT CLN09 (YE/GN) FOR AN OPEN
-
Ignition OFF.
-
Disconnect: SJB C2280d.
-
NOTE: If the fuse fails, repair circuit CLN09 (YE/GN) for a short to ground.
-
Connect a fused jumper wire between the SJB C2280d-21, circuit CLN09 (YE/GN), harness side and battery positive.
-
Do the demand lamps illuminate when switched on?
Yes
REMOVE the jumper wire. VERIFY the SJB fuse 25 (10A) is OK. If OK, GO to E2 . If not OK, REFER to the Wiring Diagrams to identify the possible
causes of the circuit short.
No
REMOVE the jumper wire. REPAIR the circuit. TEST the system for normal operation.
-------------------------------------------------
E2 CHECK FOR CORRECT SJB OPERATION
-
Disconnect all the SJB connectors.
-
Check for:
-
corrosion
-
damaged pins
-
pushed-out pins
-
Connect all the SJB connectors and make sure they seat correctly.
-
Operate the system and verify the concern is still present.
-
Is the concern still present?
Yes
INSTALL a new SJB. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
-------------------------------------------------
