TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

TM 9-2320-366-20-1

e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

CAUTION

Read CAUTION

KNOWN INFO

TEST OPTIONS

on following page.

Continuity Test or

Tachometer illuminates.

STE/ICE-R Test #91

VOLTS gage OK.

Is continuity present from

Engine speed sensor OK.

REASON FOR QUESTION

connector P901 pin 4 to

POSSIBLE PROBLEMS

If continuity is not present,

connector P913 pin 12?

Faulty dashboard cable

wire 1550 in auxiliary panel

assembly.

cable assembly is faulty. If

Faulty auxiliary panel cable

continuity is present, wire

assembly.

1550 in dashboard cable

assembly is faulty.

Repair wire 1550 from connector P901

pin 4 to connector P913 pin 12 (para

YES

2-45) or replace auxiliary panel cable

assembly (para 7-58).

Repair wire 1550 from connector J913

socket 12 to connector PX26 socket 1

(para 2-45) or replace WTEC II dashboard

cable assembly (para 7-10) or WTEC III

dashboard cable assembly (para 7-11).

2-366.4

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