New Holland CX720 Repair Manual page 2929

N° Test Point
6 Hold Mirror Adjust Switch in DOWN
position.
Check the resistance between Ger-
man Mirror (pin 2) and ground.
7 Hold Mirror Adjust Switch in DOWN
position.
Check the voltage at German Mirror
(pin 2).
8 Hold Mirror Adjust Switch in UP po-
sition.
Check the resistance between Ger-
man Mirror (pin 4) and ground.
Command Power mirror switch - Testing (E.32.A.05.10 - G.40.A.20)
Test Point
N°
1 Turn the ignition ON with the engine
OFF.
Check that Mirror Heat Switch is
open.
Check the voltage at Mirror Heat
Switch connector X127 (pin 2).
2 Close Mirror Heat Switch.
Check the voltage at the Mirror Heat
Switch connector X127 (pin 3).
BODY AND STRUCTURE - USER CONTROLS AND SEAT
Less than 1 ohm
If good reading, go to next test point.
12 volts
If good reading, go to next test point.
Less than 1 ohm
If good reading, and German mirror
does not operate properly, replace
German mirror assembly.
12 volts
If good reading, go to next test point.
12 volts
If good reading, system OK.
Expected Result
Expected Result
2 4/7/2006
E.32.A / 7
Other Result (Possible Cause)
Open in circuit 966 (GY) between
Mirror Select Switch connector X178
(pin 1) and German Mirror (pin 2).
Check the X036 (pin 19) and X287
(pin 2) in-line connectors for connec-
tion.
Mirror Adjust Switch. Perform A -
Mirror Adjust Switch Test, steps 3
and 14.
Short to ground which affects circuit
966 (GY) or open in circuit 966(GY)
between Mirror Select Switch con-
nector X178 (pin 1) and German Mir-
ror (pin 2). A short to ground will blow
Fuse #9. Check the X036 (pin 19)
and X287 (pin 2) in-line connectors
for connection.
Mirror Select Switch. Perform B -
Mirror Select Switch Test.
Open in circuits 963 (GY) or 957
(WH) between Mirror Adjust Switch
connector X126 (pin E) and German
Mirror (pin 4). Check the X036 (pin
21) and X287 (pin 4) in-line connec-
tors for connection.
Mirror Adjust Switch. Perform A -
Mirror Adjust Switch Test, steps 3
and 19.
Other Result (Possible Cause)
Open circuit 953 (OR) or 79 (OR)
between Fuse #9 and Mirror Heat
Switch (pin 2). Check the X002 (pin
H) in-line connectors for connection.
Short to ground in circuit 953 (OR) or
79 (OR). A short to ground will blow
Fuse #9.
Mirror Heat Switch.
Short to ground which affects circuit
931 (OR). Check the X036 (pin 18)
in-line connectors for connection.
A short to ground will blow Fuse #9.