M2/M3 BFV: HULL POWER DIST SYSTEM - OD1606 - LESSON 2/TASK 2
Since there was no reading indicated on the gage, SGT Haskell now
checks to see if the MASTER POWER indicator light is ON.
Upon
checking, SGT Haskell notes that it is not ON.
He now places the
MASTER POWER switch to the OFF position and connects the simplified
test equipment-M1/fighting vehicle system (STE-M1/FVS) vehicle test
meter (VTM only) to either diagnostic connector assembly (DCA) 3 or
13. The procedures for connecting the VTM to either DCA 3 or 13 were
presented in paragraph 3a(1) on page 42 of lesson 2, task 1 and will
not be repeated here.
Once the VTM has been properly connected to either of the DCAs, SGT
Haskell performs BATTERY VOLTAGE TEST NUMBER 67.
The first thing
that SGT Haskell does is dial 67 into the TEST SELECT switches on the
VTM; he then presses and releases the TEST button.
The display on
the VTM indicates a voltage reading of 22 volts.
Since the
indication that SGT Haskell was supposed to receive is 17 or more
volts, he removes the VTM following the procedures cited in paragraph
3a(1).
After the VTM is removed, SGT Haskell once again places the MASTER
POWER switch to the ON position. He then moves the service light and
utility light knobs (5, 6) (figure 42 on the following page) to the
ON position.
Since the service and utility lights came on, SGT
Haskell again moves the MASTER POWER switch to the OFF position.
With the MASTER POWER switch OFF, SGT Haskell removes plug 1W2P1 (1)
(figure 43 on page 63) from jack 1A1J10 (2).
Once the plug is
disconnected, SGT Haskell uses the multimeter to measure the voltage
between the pin (3) and ground.
While measuring the voltage of the pin, SGT Haskell receives a
voltage reading of 17 volts. He then turns the MASTER POWER switch
OFF and disconnects plug 1W10P1 (1) (figure 44 on page 64) from jack
1A1J8 (2}. At this time, SGT Haskell measures the resistance between
pin AZ (3) and the positive terminal of the volts gage.
Since the
multimeter indicates that there is no resistance present, SGT Haskell
moves the utility light and service light knobs to the OFF position.
If this was actually being performed on a vehicle, SGT Haskell would,
at this time, replace the vehicle power distribution box.
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