Escape 2WD L4-2.5L (2009)
grounded through circuit GD120 (BK/GN).
The trailer tow LH stop/turn relay coil receives voltage from circuit CLS18 (GY/BN) when the vehicle LH rear stoplamp is illuminated. When the trailer
tow LH stop/turn relay is energized, voltage is routed to the trailer tow connector through circuit CAT06 (YE).
The trailer tow RH stop/turn relay coil receives voltage through circuit CLS19 (VT/OG) when the vehicle RH rear stoplamp is illuminated. When the
trailer tow RH stop/turn relay is energized, voltage is routed to the trailer tow connector 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 tow stop/turn relay
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Trailer
PINPOINT TEST Z: THE INDIVIDUAL TRAILER LAMP IS INOPERATIVE - TRAILER STOP/TURN LAMP
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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Z1 CHECK CIRCUIT CAT06 (YE) OR CIRCUIT CAT09 (GN) FOR VOLTAGE
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Ignition OFF.
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Disconnect: Trailer Tow C439.
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For the LH trailer stop/turn lamp, while applying the brake pedal, measure the voltage between the trailer tow C439-2, circuit CAT06 (YE),
harness side and ground.
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For the RH trailer stop/turn lamp, while applying the brake pedal, measure the voltage between the trailer tow C439-1, circuit CAT09 (GN),
harness side and ground.
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Is the voltage greater than 10 volts?
Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.
No
GO to Z2.
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Z2 CHECK THE TRAILER TOW STOP/TURN RELAY
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Disconnect: Suspect Trailer Tow Stop/Turn Relay.
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Substitute a know good relay.
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For the LH trailer stop/turn lamp, while applying the brake pedal, measure the voltage between the trailer tow C439-2, circuit CAT06 (YE),
harness side and ground.
