TM
5-5420-226-20-1
Symptom-73
DETAILED
TROUBLESHOOTING
PROCEDURE
T
SUPPORT
SYSTEM
- PERSONNEL
HEATER
(Continued)
~ Check
for electrical
power
at personnel
heater
fuel
pump (CKT 402).
First
l
l
l
Technician
(Personnel
Heater)
Disconnect
harness
connector
in personnel
heater
fuel pump
power
lead.
Set multimeter
to measure
18 to 30voltsdc,
or use
STE/ICE
Test
No.
89 (page
4-81).
Connect
red probe
of meter
to harness
connector
(CKT
402) and black
probe
to ground.
Second
Technician
(Operators
Station)
l Set HEATER
MASTER
switch
ON.
l Set PERSONNEL
HEATER
HVLO
First
Technician
(Personnel
Heater)
switch
ON-LO
l Check if meter indicates
18 to 30 volts
dc.
Does meter
indicate
18 to 30 volts dc?
Set PERSONNEL
HEATER
H1/
LO switch
OFF.
Replace
personnel
heater
fuel
pump (page
18-24).
Connect
fuel
line
quick
disconnect
at
personnel
heater.
ESS
CTOR
402)
P
PUMP
(
cJo-
YES
NO
I
I
CKT
)
l Set PERSONNEL
HEATER
H1/
LO switch
OFF.
l Inspect
heater
to
basket
disconnect
harness
for bent/
broken
connector
contact
or
loose CKT 402 wire at rear of
connector.
l Repair
connector
if defective
(page
10-298).
l If connector
is not defective,
notify
support
maintenance
of
defective
heater
to basket
disconnect
harness.
l Connect CKT 402 connector
at
fuel pump.
l Connect
fuel
line
quick
disconnect
at
personnel
heater.
TA107383
4-694