PS Magazine - TB 43-PS-725
PS, The Preventative Maintenance Monthly
ISSUE 725
APRIL 2013
17
PS 725
APR 13
Fixing the Problem
Here’s the recommended feld-level repair. It allows you to secure the wiring
harness out oF the way oF vehicle controls. Just Follow this procedure:
TM Update Needed
Some oF you have seen the wiring harness problem
and have even tried to fx it. Problem is, TM 9-2320-
387-24-2 (Dec 97) only tells you how to route and
secure an A±ES wiring harness installed with the
standard
radio rack. There are no specifc installation
instructions For routing or securing the A±ES wiring
harness with the
integrated
radio rack.
The B±T/integrated radio rack installation TBs, 11-
7010-438-23 and 9-2320-387-35-1, don’t help you
with this, either. So the way you see the A±ES routed
in HMMWVs with the integrated radio rack installed
could vary.
1.
Disconnect your HMMWV’s batteries.
2.
Disconnect the wiring harness from the AFES master controller.
3.
Move all wiring out from behind the AFES master control mounting bracket.
4.
Drill a
5
/
16
-in hole. The
hole should be drilled
1
/
2
inch down from the
top of the bracket and
centered.
5.
Reconnect
the
wiring
harness
to
the
AFES
master controller.
6.
Form a loop with the
excess
wiring
harness
length and secure it with
a zip-tie. Place the loop
and zip-tie behind the
integrated radio rack.
7.
Position the wiring harness and secure it to the drilled hole with a zip-tie. The zip-
tie should be fed through the back of the bracket and the wiring harness should
be positioned toward the top of the bracket.
8.
Make sure you can use all vehicle controls without touching the harness.
9.
Reconnect your HMMWV’s batteries.
HMMWV…
Help for
AFES
Wiring
Harness
Hiccup!
that
unsecured
harness gets
tangled with
the hmmwv’s
transmission,
transfer
and parking
brake control
levers.
is the integrated radio
rack installed in your
m1151, m1152, m1165, or
m116
7
series hmmwv?
if so, you may have noticed
a problem with the automatic
fire extinguishing system
(afes) master controller’s
wiring harness.
that puts too
much stress on the
wiring harness and
can accidentally
discharge the afes
during vehicle
operation.
Drill hole
1
/
2
inch down
and centered.
Zip-tie should
be installed
from rear of
bracket and
under wiring
harness
Integrated Rack in an M1151 HMMWV
thank god
I Got out
in time!
I wonder
what set off
the AFES?
725 16-17.indd
1-2
2/22/13
3:53 PM
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