Explorer AWD V8-4.6L (2010)
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Enter the following diagnostic mode on the scan tool: SJB Self-Test.
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Clear the continuous DTCs. Repeat the on-demand self-test.
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Is DTC B2070 still present?
Yes
For the 4-pin connector, GO to AA5.
For the 7-pin connector, GO to AA4.
No
GO to AA3.
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AA3 CHECK THE NUMBER OF BULBS ON THE TRAILER
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Inspect the trailer for more than 2 RH stop/turn lamp bulbs.
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Are more than 2 RH stop/turn lamp bulbs present?
Yes
INFORM the customer that the vehicle can only support 2 stop/turn lamp bulbs per side. Any additional stop/turn lamp bulbs need to be removed from
the trailer or an adapter kit installed for the trailer tow lamps to operate correctly.
No
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.
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AA4 CHECK THE TRAILER TOW CONNECTOR
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Disconnect: Trailer Tow C473.
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Enter the following diagnostic mode on the scan tool: SJB Self-Test.
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Clear the continuous DTCs. Repeat the on-demand self-test.
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Is DTC B2070 still present?
Yes
GO to AA5.
No
INSTALL a new trailer tow connector. TEST the system for normal operation.
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AA5 CHECK THE RH TRAILER STOP/ TURN LAMP CIRCUIT FOR A SHORT TO GROUND
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Ignition OFF.
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Disconnect: SJB C2280a.
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Measure the resistance between the SJB C2280a-26, circuit CAT09 (GN), harness side and ground.
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Is the resistance greater than 10,000 ohms?
Yes
GO to AA9.
