M2/M3 BFV: FIRE SUPPRESSION SYST - OD1607 - LESSON 2/TASK 2
THE VEHICLE DISTRIBUTION BOX.
(c) Using a multimeter, PFC Elrond measures the voltage
between jack 1A1J8 pin BN and ground.
If 20 or more volts are
present, he must replace wiring harness 1W10. However, he obtains a
reading of only 16 volts.
(d) PFC Elrond now knows that the problem is in the vehicle
He replaces the vehicle electrical distribution
box following the procedures outlined in TM 9-2350-252-20-1-3. When
the replacement is completed, he verifies that the problem has been
solved by repeating the initial tests and performing the procedures
in pathway one if STE-M1/FVS test 67 registers less than 20 volts.
e. Pathway Three.
Another troubleshooting pathway that can
isolate a defective component within the fire suppression system
develops when the initial test results are: test number 67 reads more
than 20 volts; the gage pressure readings on both squad