This task covers:
Shop Equipment, Automotive Maintenance and
Power shut off, power panel and rear control panel
ECV parking brake set.
ECU doors and covers open or removed as required
ECU work platform installed (reference TM
Tag and remove two screws (1) securing two leads (2) of cable assembly 1A4A1W1 from overheat
switch A1TS1 (3) mounted on heater element assembly (4).
Remove two nuts (5), two lockwashers (6), four flat washers (7) and two screws (8) securing
overheat switch (3) to heater element assembly (4). Discard two lockwashers (6).
Screws that attach leads to overhead switch are supplied with the switch.
Secure overheat switch (3) to heater element assembly (4) with two screws (8), four flat washers
(7), two new lockwashers (6) (Item 18, Appx E) and two nuts (5).
Install two leads (2) of cable assembly 1A4A1W1 on overheat switch A1TS1 (3) with two screws
(1). Remove tags from two leads (2).
HEARING PROTECTION REQUIRED
WITHIN 25 FEET OF THIS POINT.
Follow-on maintenance: Install or close ECU covers and doors per para 2.14.1, remove tags, apply power and
perform operational test, remove ECU work platform (reference TM 10-5410-228-10).