Ranger 4WD V6-4.0L (2009)
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Is the voltage greater than 10 volts?
Yes
GO to G4.
No
VERIFY the SJB fuse 19 (20A) is OK. If OK, GO to G3. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short.
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G3 CHECK CIRCUIT SBP19 (BU/RD) FOR AN OPEN
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Disconnect: SJB C2280b.
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Measure the resistance between the SJB C2280b-31, circuit SBP19 (BU/RD), harness side and the stoplamp switch C278-1, circuit SBP19
(BU/RD), harness side.
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Is the resistance less than 5 ohms?
Yes
GO to G11.
No
REPAIR the circuit. TEST the system for normal operation.
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G4 CHECK CIRCUIT CCB08 (VT/WH) FOR AN OPEN (ALL STOPLAMPS INOPERATIVE)
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Connect a fused jumper wire between the stoplamp switch C278-1, circuit SBP19 (BU/RD), harness side and the stoplamp switch C278-2, circuit
CCB08 (VT/WH), harness side.
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Do the stoplamps illuminate?
Yes
REMOVE the jumper wire. INSTALL a new stoplamp switch. REFER to Stoplamp Switch See: Brake Light Switch/Service and Repair. TEST the
system for normal operation.