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TM 9-2350-267-20
E Remove engine compartment access cover. With engine run-
ning, disconnect wire 509B. If MASTER WARNING light goes
out, replace engine oil low pressure switch (p 6-10). If light con-
tinues to burn, go to Step F.
NOTE
To trace circuit 509, check wiring harnesses
12268102 (p 6-64), 12268100 (p 6-68), 12260287
(p 6-84), and 12260298 (p 6-89).
F
With engine
running, disconnect wire 509A. If MASTER WAR-
NING light goes out, replace engine coolant high temperature
switch (p 6-9). If light continues to burn, troubleshoot 509
circuit.