E 450 V8-5.4L (2009)
ground.
-
Is the voltage greater than 10 volts?
Yes
GO to T12.
No
REPAIR circuit CLS19 (VT/OG) for an open. TEST the system for normal operation.
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T12 CHECK THE VOLTAGE SUPPLY CIRCUIT TO THE RH TRAILER TOW STOP/TURN RELAY FOR AN OPEN
-
Measure the voltage between the trailer tow RH stop/turn relay pin 3, circuit SBB48 (VT/RD), BJB face side and ground.
-
Is the voltage greater than 10 volts?
Yes
GO to T13.
No
REPAIR circuit SBB48 (VT/RD) for an open. TEST the system for normal operation.
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T13 CHECK THE VOLTAGE SUPPLY CIRCUIT TO THE RH TRAILER TOW STOP/TURN RELAY USING THE RELAY GROUND
CIRCUIT PIN
-
Measure the voltage between the trailer tow RH stop/turn relay pin 3, circuit SBB48 (VT/RD), BJB face side and the trailer tow RH stop/turn
relay pin 2, circuit GD123 (BK/GY), BJB face side.
-
Is the voltage greater than 10 volts?
Yes
REPAIR circuit CAT09 (GN) for an open. TEST the system for normal operation.
No
REPAIR circuit GD123 (BK/GY) for an open. TEST the system for normal operation.
