TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 239 of 1313
TRAILER AND SEMITRAILER CONNECTION SYSTEM OPERATION
The trailer receptacle is identical on all models covered in this manual. The semitrailer receptacle is on the tractor
body only.
A. SEMITRAILER RECEPTACLE
- M931/A1/A2 and M932/A1/A2 vehicles equipped with a fifth wheel are
provided with a semitrailer receptacle. This receptacle provides vehicle lighting, auxiliary power, and a
ground circuit for semitrailers.
B. TRAILER RECEPTACLE
- Provides vehicle lighting, auxiliary power, and a ground circuit for trailers.
B
A
G0036DAA
Figure 24.
Trailer and Semitrailer Connection Components.
TM 9-2320-272-23-1
0003
0003-34
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