PS Magazine - TB 43-PS-675
PS, The Preventative Maintenance Monthly
ISSUE 675
FEBRUARY 2009
12
PS 675
FEB 09
Flashing
Removal and Replacement
Use your FMTV truck’s IETM, EM 0195, to get to the maintenance procedures
found in TM 9-2320-392-20. Then follow these steps to remove and replace the K-
10 relay and ±
x the faulty fl
ashing:
1.
Set the external master manual battery disconnect switch to OFF.
2.
Make sure the service light switch is set to OFF.
3.
Remove the PDP using the Power Distribution Panel Replacement (PDPR)
procedures in your IETM.
4.
Open the module 2 relay panel cover using EM 0195’s Circuit Breaker and
Relay Replacement Work Package.
PN 2802 (CAGE 5J417)
PN 301-1C-S-D1 (CAGE 1HKM2)
PN 301-1C-C-D1 (CAGE 1HKM2)
PN ACV12112 (CAGE 0J4G8)
New K-10 Relay
The culprit is the
K-10 relay located
in the passenger side
power distribution
panel (PDP). It doesn’t
operate correctly in that
circuit, so the front turn
signal lights fl
ash.
FMTV
trucks with serial numbers 100,001 to 115,482 need a new K-10 relay.
That’s because these newer production 2
1
/
2
- and 5-ton FMTV trucks equipped with
LED service light switches have a problem with unexpected fl
ashing of the front
turn signals.
Fortunately, older model FMTV trucks with mechanical-type light switches and
incandescent turn signal light bulbs are not affected.
The faulty front turn signal fl
ashing happens when the ignition switch is placed in
the ON position, the engine is running, the air pressure is in the normal range and the
service lights are in blackout mode. The front turn signal lights will fl
ash once each
time the operator releases brake pedal pressure.
Flashing
FMTV…
Fix for Faulty
Flashing
a new replacement
relay is available to
correct this problem.
replacement k-10
relays are identified by
a blue marking on top.
these relays will also have
any one of the following
vendor part numbers
stamped on them…
K-10 relay is in power distribution panel…
…in Number 2 Relay Module
K-10 relay location
What’s
bugging
you?
Every time I let off
the brakes, our turn
signal flashes
so?
So…I think we’ve
given someone the
wrong idea!
675.12-13.indd
1-2
1/2/09
2:49:57 PM
Click here for a copy of this article to save or email.
Back to TopBack to Top
