
TROUBLESHOOTING AND ELECTRICAL SYSTEM
Test Procedures
2005 FE350 Gasoline Vehicle Maintenance and Service Supplement
Page 11-53
11
TEST PROCEDURE 41 – HORN SWITCH
See General Warning, Section 10, Page 10-1.
1. Disconnect the battery cables as instructed.
See WARNING “To avoid unintentionally starting...” in
General Warning, Section 10, Page 10-1.
2. Disconnect the orange and red/white wires at the horn button from the wire harness.
3. Using a multimeter set to 200 ohms, place the probes into the two terminal plug holes on the horn har-
ness
(Figure 11-57, Page 11-52)
.
4. The reading should show no continuity. With the horn button pressed, the reading should show continu-
ity.
5. If the readings are incorrect, replace the horn button.