Ranger 2WD L4-2.3L (2009)
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U3 CHECK FOR CORRECT SJB OPERATION
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Disconnect all the SJB connectors.
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Check for:
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corrosion
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damaged pins
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pushed-out pins
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Connect all the SJB connectors and make sure they seat correctly.
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Operate the system and verify the concern is still present.
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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.
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Pinpoint Test V: The Individual Trailer Stop/Turn Lamp Is Inoperative
Trailer Lamps
Pinpoint Tests
Pinpoint Test V: The Individual Trailer Stop/Turn Lamp Is Inoperative
Refer to wiring Diagram Set 95, Trailer/Camper Adapter for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
Normal Operation
When the brake pedal is applied, voltage is provided to the trailer tow connector for the LH trailer stop/turn lamp through circuit CAT06 (YE) and the
RH trailer stop/turn lamp through circuit CAT09 (GN).
This pinpoint test is intended to diagnose the following:
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Fuse
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Wiring, terminals or connectors
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Trailer
PINPOINT TEST V: THE INDIVIDUAL TRAILER STOP/TURN LAMP IS INOPERATIVE
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
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V1 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR
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While applying the brake pedal, measure the voltage between the trailer tow C439-2, circuit CAT06 (YE) (LH stoplamp), harness side and ground;
or between the trailer tow C439-1, circuit CAT09 (GN) (RH stoplamp), harness side and ground.
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Is the voltage greater than 10 volts?
