Trailer Tow Connector, 4-Pin Connector End View (C439)

Fig 1: Identifying Trailer Tow Connector, 4-Pin Connector (C439)

Courtesy of FORD MOTOR CO.

Pin	Circuit	Gauge	Circuit Function	Qualifier
1	CAT09 (GN)	14	CTRL MOD. - TRAILER TOW # TURN SIGNAL RIGHT
2	CAT06 (YE)	14	CTRL MOD. - TRAILER TOW # TURN SIGNAL LEFT
3	CAT11 (BN)	14	RELAY - TRAILER TOW PARK LAMPS
4	GD150 (WH)	14	GROUND - PILLAR D RIGHT

Available Pigtail Kits
Pigtail Kit Part Number WPT-840	Service Part Number: 5U2Z-14S411-JA  Gauge: 12  Pin material: Tin  Cavities: 4  Vehicle Uses Trailer Tow - Vehicle Side