Case IH AFX8010 Repair Manual page 1799

BODY AND STRUCTURE - SAFETY SECURITY ACCESSORIES Safety
Back up alarm - Unidentified failure (E.50.B.82 - G.30.B.46)
AFX8010
E0065-11 - Ground Drive Backup Alarm
Cause:
The backup alarm (H-08) circuit open or shorted to ground.
Possible failure modes:
1. Circuit connection/wiring damaged between CCM1 and backup alarm.
2. Controller internal failure (internal regulator failure).
Solution:
1.
Turn the key switch to the OFF position and disconnect the backup alarm connector X248. Use a multimeter to
check the resistance of the backup alarm coil. The proper resistance range for the coil is 1.0 - 8.0 ohms.
A.
If out of specification, replace coil.
B. If the coil is within specification, continue with Step 2.
2. Disconnect connector X248. Use a multimeter to check for continuity between connector X248 pin 1 (white
wire) and chassis ground. Flex the harness while making this check.
A. If no continuity to ground is found, continue with Step 3.
B. If there is continuity to ground, continue with Step 6.
3. Disconnect connector X248. Turn the key switch to the ON position. Use the Universal Display Plus "DIAG"
screen controls to manually power the backup alarm. Use a multimeter to check for 12 volts between
connector X248 pin 1 and chassis ground.
A.
If 12 volts is not present, continue with Step 4.
B. If 12 volts is found, continue with Step 8.
4. Disconnect connector X071. Key switch to the ON position. Use the Universal Display Plus "DIAG" screen
controls to manually power the backup alarm. Use a multimeter to check for 12 volts between connector
X071 pin 14 and chassis ground.
A. If 12 volts is not present, continue with Step 5.
B. If there is 12 volts, there is an open circuit in the straw hood rear (SH) harness between connector X071
and connector X248 wire 452 white. Locate the open and repair.
5.
Disconnect connector X024. Key switch to the ON position. Use the Universal Display Plus "DIAG" screen
controls to manually power the backup alarm. Use a multimeter to check for 12 volts between connector
X024 pin 13 and chassis ground.
A. If 12 volts is not present, there is an open circuit in the main frame (MF) harness between connector
X024 and connector X019 J2-6 wire 452 white.
B. If there is 12 volts, there is an open circuit in the straw hood front (SW) harness between connector
X024 and connector X071 wire 452 white. Locate the open and repair.
6. Disconnect connector X071. Use a multimeter to check for continuity between connector X071 pin 14 and
chassis ground.
A. If continuity is found, continue with Step 7.
B. If no continuity is found, the short to ground is in the straw hood rear (SH) harness between connector
X071 and connector X248 wire 452 white. Locate the short and repair.
7. Disconnect connector X024. Use a multimeter to check for continuity between connector X024 pin 13 and
chassis ground.
9703 1 27/05/2004
E.50.B / 3