TM 9-4910-387-14-2
6-2.
TROUBLESHOOTING (cont)
A.
FORWARD-OFF-REVERSE
B.
REVERSE TACHOMETER REVERSING
SWITCH MAY BE DEFECTIVE.
RELAY MAY BE DEFECTIVE
NOTE
1 Refer to page 6-14 for troubleshooting
The following check is for resistance.
procedures.
2 If TACHOMETER indicator assembly
1 Connect one multimeter lead to reverse
does not function, proceed to step B.
tachometer reversing relay coil contact (1)
and connect the other lead to reverse
tachometer reversing relay coil contact (2).
2 Check for approximate resistance reading of 100 ohms.
If
resistance is not present, replace the reverse tachometer reversing
relay (3) (p 6-219).
3 Check the reverse tachometer reversing relay contacts (4 and 5) to
see if they are pitted or welded together. If damaged, replace
reverse tachometer reversing relay (3) (p 6-219).
4 If TACHOMETER indicator assembly does not function, proceed to
step C.
6-122
