Turn Signal Question
FAB-18440-C is for 53/55
B4C-18440-A is for 55
B6C-18440-A is for 56
For the larger trucks:
FAB-18440-D is for 53
B4Q-18440-A is for 54/55
Looking at the breakdown of FAB-18440-C:
FAC-13305-A Turn Signal Handle and Shaft Assembly
FAA-13318-A Turn signal cancel cam
FAB-13341-C Turn signal switch and mounting plate assembly
FAA-13350-A1/A2 Flasher Assembly
FAB-13351-A Flasher Bracker
FDE-14404-A Flasher Wiring
FAA-14435-A Turn signal Switch to Lamp wiring
FAC-14500-B Insulator
51W-14572 Steering Column Wiring Clamp
48-15021 Bulb
8M-18954 Turn signal to existing Wiring harness
42728-S8 #10-32x1/2 Hex head screw & lockwasher assembly
50626-S8 #8-32x1/4 round head phillips recessed screw
52720-S8 #8-15x3/8 pan head self tapping screw
358350-S Wiring Clip
6K-FAB-18440-A Instruction Sheet
FAB-18440-D is made up of the following, differences highlighted with an *:
FAC-13305-A Turn Signal Handle and Shaft Assembly
*FAA-13318-B Turn signal cancel cam
*FAB-13341-D Turn signal switch and mounting plate assembly
FAA-13350-A1/A2 Flasher Assembly
FAB-13351-A Flasher Bracker
FDE-14404-A Flasher Wiring
FAA-14435-A Turn signal Switch to Lamp wiring
FAC-14500-B Insulator
51W-14572 Steering Column Wiring Clamp
48-15021 Bulb
8M-18954 Turn signal to existing Wiring harness
42728-S8 #10-32x1/2 Hex head screw & lockwasher assembly
50626-S8 #8-32x1/4 round head phillips recessed screw
52720-S8 #8-15x3/8 pan head self tapping screw
358350-S Wiring Clip
6K-FAB-18440-A Instruction Sheet
I don't have an immediate complete breakdown, but as best I can tell, the B4Q-18440-A is made up of some different parts including:
FDM-14486-A
FDM-14499-A
It boils down to "Yes, there are differences. Do they matter (to you)?"











