TM 1-2840-252-23-3
G-57
UNABLE TO SWITCH TO PRIMARY MODE EXPAND ED INSTRUCTIONS
Refer to numbered steps in figure 143.
Step 2..
Check harness connector PL3 (figure 201) at DECU for tight connection.
Step 3.
Disconnect connector PL3 to check pins and sockets.
Step 5.
With PL3 disconnected and primary mode selected, check resistance of primary/reversionary
switch at harness PL3 connector sockets x and e (figure 202). Limit is >150KW. With reversionary
mode selected, check resistance again. Limit is <50W.
Step 6.
Before tightening harness connector PL3, b sure that keyway in harness connector is aligned with
e
keyway in component connector.
Step 10.
Refer to manufacturer's procedure for diagnosing and replacing harness.
Step 12.
Refer to manufacturer's procedure for diagnosing and replacing switch or harness.
RESISTANCE-CHECK SUMMARY
G-129
