Flex AWD V6-3.5L (2009)
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Is the voltage greater than 10 volts?
Yes
INSTALL a new trailer tow connector. TEST the system for normal operation.
No
GO to AD3.
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AD3 CHECK THE TRAILER BATTERY CHARGE RELAY (INOPERATIVE)
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Ignition OFF.
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Disconnect: Trailer Battery Charge Relay.
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Substitute a known good relay.
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Ignition ON.
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Measure the voltage between the trailer tow C4099-5, circuit CAT14 (OG), harness side and ground.
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Is the voltage greater than 10 volts?
Yes
REMOVE the known good relay. INSTALL a new trailer battery charge relay. TEST the system for normal operation.
No
REMOVE the known good relay. GO to AD4.
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AD4 CHECK FOR VOLTAGE TO THE TRAILER TOW BATTERY CHARGE RELAY SWITCH
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Ignition OFF.
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Measure the voltage between the trailer battery charge relay pin 30, circuit SBB30 (BN/RD), BJB face side and ground.
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Is the voltage greater than 10 volts?
Yes
GO to AD5.
No
REPAIR circuit SBB30 (BN/RD) for an open. TEST the system for normal operation.
