Navigator 4WD V8-5.4L (2010)
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While applying the brake pedal, measure the voltage between the trailer tow RH turn relay pin 1, circuit CLS19 (VT/OG), BJB face side and
ground.
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Is the voltage greater than 10 volts?
Yes
GO to Z12.
No
REPAIR circuit CLS19 (VT/OG) for an open. TEST the system for normal operation.
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Z12 CHECK THE VOLTAGE SUPPLY CIRCUIT TO THE RH STOP/TURN LAMP RELAY
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Measure the voltage between the trailer tow RH turn relay pin 3, circuit SBB45 (GY/RD), BJB face side and ground.
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Is the voltage greater than 10 volts?
Yes
GO to Z13.
No
REPAIR circuit SBB45 (GY/RD) for an open. TEST the system for normal operation.
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Z13 CHECK THE VOLTAGE SUPPLY CIRCUIT TO THE RH STOP/TURN LAMP RELAY USING THE RELAY GROUND PIN
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Measure the voltage between the trailer tow RH turn relay pin 3, circuit SBB45 (GY/RD), BJB face side and the trailer tow RH turn relay pin 2,
circuit GD123 (BK/GY), BJB face side.
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Is the voltage greater than 10 volts?
Yes
REPAIR circuit CAT09 (GN) for an open. TEST the system for normal operation.
No
REPAIR ground GD123 (BK/GY) for an open. TEST the system for normal operation.
