TM 5-3895-379-23-1
0058
MALFUNCTION
Drum Select Switch Faulty.
CORRECTIVE ACTION
1.
Touch positive (+) probe of multimeter to terminal 4 (wire C926-BU).
2.
Touch negative (-) probe of multimeter to good ground.
3.
Pull drum select switch back to rear position to check rear vibratory circuit.
4.
Touch positive (+) probe of multimeter to terminal 6 (wire C927-PU).
5.
Touch negative (-) probe of multimeter to good ground
6.
Push drum select switch forward to front position to check front vibratory circuit.
7.
Touch positive (+) probe of multimeter to terminal 6 (wire C927-PU) and then to terminal 4 (wire
C926-BU) while drum select switch is in center position to check vibratory circuit to both drums.
a.
If 24 to 28 VDC are not measured at terminal 4 (wire C926-BU) while drum select switch is
pulled back to rear position, perform the following:
(1)
Turn engine start switch to OFF position (TM 5-3895-379-10).
(2)
Turn battery disconnect switch to OFF position (TM 5-3895-379-10).
(3)
Replace drum select switch (WP 0158).
b.
If 24 to 28 VDC are not measured at terminal 6 (wire C927-PU) while drum select switch is
pushed forward to front position, perform the following:
(1)
Turn engine start switch to OFF position (TM 5-3895-379-10).
(2)
Turn battery disconnect switch to OFF position (TM 5-3895-379-10).
(3)
Replace drum select switch (WP 0158).
c.
If 24 to 28 VDC are measured at terminals 4 and 6 while drum select switch is in center
position, perform the following:
(1)
Turn engine start switch to OFF position (TM 5-3895-379-10).
(2)
Turn battery disconnect switch to OFF position (TM 5-3895-379-10).
(3)
Replace drum select switch (WP 0158).
d.
If all voltage output checks at drum select switch are OK, go to next malfunction.
0058-7
03/15/2011Rel(1.8)root(tswp)wpno(T00064)
