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TM 9-2350-267-20
A
Remove engine compartment access cover (p 3-14). Disconnect
wire 415B from air cleaner blower pressure switch. Turn
MASTER switch ON and use jumper wire to ground wire 415B.
If blower motors operate, replace switch (p 6-10). If blower
motor fails to operate, go to step B.
NOTE
To trace circuit 415B check harnesses 12268102
(p 6-64), 12268100 (p 6-68), 12260287 (p 6-84) and
10897991 (p 6-92).
B Disconnect wire 415B at air cleaner blower relay. Using jumper,
ground wire 415B (lead from blower relay). If blower motors
operate, replace wire 415B from air cleaner blower relay to air
cleaner blower pressure switch. If motor fails to operate, go to
step c.
TA310473