PS Magazine - TB 43-PS-560
PS, The Preventative Maintenance Monthly
ISSUE 560
JULY 1999
PS 560
5
JUL 99
ere’s the truth about three electric
light problems on FMTVs:
Trailer Lights Not Working?
If trailer lights don’t work after
you’ve hooked up, check the tie wrap
around the P53 wiring harness at the
rear of the truck.
The tie wrap can be too tight, pull-
ing the plug out of the connector.
Loosen the wrap, push the plug into
the connector and the trailer lights
should come on. If not, troubleshoot.
4572-S
Family of Medium Tactical Vehicles . . .
Red
indicates
plugged
filter
If it’s your mechanic’s job to service
the filter, make sure he does. He can
use an air hose to blow away stubborn
dirt and sand. If the restriction indica-
tor still shows red, the filter must be
replaced.
Never leave lids off grease and oil
containers. Sand gets in the cans if the
lids are off, and then gets inside your
equipment. Likewise, before plugging
in the grease gun, wipe off the grease
fittings. That keeps dirt and grit that
sticks to old lube from being forced
into a fitting.
Filters
Sand in an air or oil filter may mean
a contaminated system. Stop the sand
before it gets inside. When you pull
lube services at shortened intervals, ser-
vice or change the filters, too.
Protect oil containers from sand once
they are opened and shelter the funnel
from blowing sand when oil is added
to components. Once the sand is in the
oil, the only fix is changing oil and
replacing the filter.
All air cleaner elements need to be
cleaned at least daily in the desert—
sometimes more often.
Watch your vehicle’s air restriction
indicator. If it shows red, stop operat-
ing the equipment. If your -10 TM al-
lows, remove the filter and tap it to
knock out most of the sand and dirt.
Never bang it against anything hard
like a rock or tire. That can damage
the element and make it worthless
against sand and dirt.
surfaces and the terminal lug to get rid
of the corrosion that’s dimming the
light. If you don’t, the light will burn
out.
Check
for loose
electrical
connection
PS 560
4
hey,
why
aren't
you
guys
clogged
up
?
you're
no match
for
good
pm
!
these
light problems
have
me
in the dark
,
molder.
the
truth
is
right here
,
skulky!
Left Headlight Dim?
If your truck sports a dim left head-
light, check the ground screw. Remove
the screw and nut from the bracket
above the headlight. Clean the mating
Wayward Juice?
If you turn on the headlights and the
windshield wipers come on, check for
a bad ground on the right side com-
posite light.
Remove and clean the left-side screw
on the back of the light. After rein-
stalling the screw, check your head-
lights. If the wipers still come on,
troubleshoot.
Remove
and clean
terminal
lug and
mating
surfaces
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