Case IH AFX8010 Repair Manual page 1725

Test Point
1 Turn the Key Switch S-02
ON, with the engine OFF.
Select Mirror Adjust Switch
S-27 selector to
Right/German Mirror.
Hold Mirror Adjust Switch
S-27 in IN position.
Check the voltage at Mirror
Select Switch S-57
connector X178 (pin 2).
2 Set Mirror Select Switch
S-57 to German Mirror.
Hold Mirror Adjust Switch
S-27 in IN position.
Check the voltage at Mirror
Select Switch S-57
connector X178 (pin 1).
3 Set Mirror Select Switch
S-57 to RH Mirror.
Hold Mirror Adjust Switch
S-27 in IN position.
Check the voltage at Mirror
Select Switch S-57
connector X178 (pin 3).
Test Point
1 Turn the Key Switch S-02
ON, with the engine OFF.
Select Mirror Adjust Switch
S-27 selector to Left mirror.
Hold Mirror Adjust Switch
S-27 in IN position.
Check the voltage at LH
Mirror M-22 (pin 5).
2 Hold Mirror Adjust Switch
S-27 in IN position.
Check the resistance
between LH Mirror M-22
(pin 1) and ground.
BODY AND STRUCTURE - USER PLATFORM
B - MIRROR SELECT SWITCH TEST
Good Reading
12 volts
If good reading, go to next
test point.
12 volts
If good reading, go to next
test point.
12 volts
If good reading, system
OK.
C - LH POWER MIRROR TEST
Good Reading
12 volts
If good reading, go to next
test point.
Less than 1 ohm
If good reading, go to next
test point.
E.34 / 23
Possible Cause of Bad Reading
Short to ground which affects circuit 954
(GY) or open in circuit 954 (GY) between
Mirror Select Switch S-57 connector
X178 (pin 2) and Mirror Adjust Switch
S-27 connector X126 (pin F). A short to
ground will blow Fuse F09.
Mirror Adjust Switch S-27. Perform A -
Mirror Adjust Switch Test, steps 1, 2, and
8.
Mirror Select Switch S-57.
Short to ground which affects circuit 966
(GY), between Mirror Select Switch S-57
connector X178 (pin 1) and German
Mirror (pins 2 and 5). Check the X036
(pin 19) and X287 (pin 2) in-line
connectors for connection. A short to
ground will blow Fuse F09.
Mirror Select Switch S-57.
Short to ground which affects circuit 956
(GY), between Mirror Select Switch S-57
connector X178 (pin 3) and RH Mirror
(pins 2 and 5). Check the X036 (pin 20)
and X121 (pin 2) in-line connectors for
connection. A short to ground will blow
Fuse F09.
Possible Cause of Bad Reading
Short to ground which affects circuit 961
(GY) or open in circuit 961 (GY) between
Mirror Adjust Switch S-27 connector
X126 (pin C) and LH Mirror M-22 (pin 5).
Check the X036 (pin 25) and X111 (pin
2) in-line connectors for connection. A
short to ground will blow Fuse F09.
Mirror Adjust Switch S-27. Perform A -
Mirror Adjust Switch Test, steps 1, 2 and
4.
Open in circuit 959 (WH) between Mirror
Adjust Switch S-27 connector X126 (pin
B) and LH Mirror M-22 (pin 1). Check the
X036 (pin 23) and X111 (pin 1) in-line
connectors for connection.
Mirror Adjust Switch S-27. Perform A -
Mirror Adjust Switch Test, steps 3 and 12.