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Page Title:
TABLE 6-2. TROUBLESHOOTING - continued |
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 TABLE 6-2. TROUBLESHOOTING (Cont'd)
STEP
PROCEDURE
CORRECTIVE ACTION
Electrical (Cont'd)
6. Truck wheels turn
b.
SC relay.
b. Check resistance of SC
at 75% of maximum(Cont'd)
relay coil. Replace re-
lay if defective.
c.
3SP suppressor.
c. Check diodes between
terminals 1 and 2 of 3SP
module. Replace if de-
fective.
d.
FW pack .
d. Check resistance between
terminals 1 and 2 of FWP
in series with SC con-
tacts. Replace if de-
fective.
e.
Field weakening
e. Check fuse 6FU. Replace
contactor fails to
if defective. Check FW
pick up.
relay coil. Replace if
defective. Check FW
resistor. Replace if
defective.
7. No power steering.
a.
Power steering pump
a. - Check the following:
motor circuit.
(1) Fuses 6FU and 10FU.
Replace defective
fuse.
(2) ARP module. Replace
if defective.
(3) No. 2 Circ. of direc-
tional switch. Re-
pair or replace as
required.
(4) IS relay coil open
or shorted. Check
using ohmmeter. Re-
place if defective.
(5) IS contact of relay
coil IS. Clean con-
tact with crocus
cloth or fine file.
(6) Diodes between ter-
minals 1 and 4 of
4SP suppressor module.
Check with ohmmeter.
Replace 4SP module if
defective.
(7) Power steering motor.
Check and replace if
defective.
6-8
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