TM 3-4240-302-30&P-3
Measure voltage
between:
(+)
(-)
28 V dc positive J20-D
Turn timer slightly
to right (1/4 of way
to 5 position).
Did
purge
indicator
light?
Did multimeter
indicate
28 2 V dc?
Remove power. Remove
screws on PECM panel
and lift up for access to
Proceed to page 2-16.
components (p 2-33).
Repair wire (4) between
S4-T1 and J20-D
(p. 2-44). Apply power.
Repeat test on this page.
Remove power.
Remove screws on
PECM panel and lift
up for access to
components
(p. 2-33). Apply
power. Measure
voltage between:
(+)
(-)
S4-T1
TB1-1
Measure voltage
Measure voltage
between:
between: (Make
Was 0 V dc
sure timer is
(+)
(-)
obtained?
running.)
S4-L1
TB1-1
(+)
(-)
DS3-2
TB1-1
Was 0 V dc
obtained?
Was 0 V dc
obtained?
Remove power. Repair
Remove power. Replace
Remove power. Repair
Remove power. Replace
wires #2, #9, and TB1
PURGE indicator light
wire (10) between DS3-2
interval TIMER switch S4
jumper from S4-L1
DS3 (p. 2-36). Apply
and S4-T1 (p. 2-44).
(p. 2-37). Apply power.
(p. 2-44). Apply power.
power. Repeat test on
Apply power. Repeat test
Repeat test on this page.
Repeat test on this page.
this page.
on this page.
2-15
