New Holland T8010 Manual page 1348

Interior Lighting and Horn System Circuit Operation
Interior lighting consists of a switchable dome light with door switch, a switchable map light, and a console light
which operates in conjunction with the Instrument Cluster lighting.
The dome light can be set to either come on when the door opens or it can be switched on with an integral switch.
The power source is unswitched, so the dome light can be operated at any time.
The power supply for the horn is switched. When the key is in the ON position the circuit is energized. To operate
the horn, ground is provided by pressing the horn button on the universal switch.
Interior Lighting and Horn System Circuit Troubleshooting
Before troubleshooting the Interior Lighting and Horn system make sure that the following operating conditions are
met:
A. The batteries are fully charged and all connections are clean and tight.
B. Transmission in neutral or park.
C. Check all connectors for full installation, loose, corroded, pushed out, or bent terminals.
D. Fuses 16, 17, 18 and 19 are good.
Section 55 - Electrical System - Chapter 1
INTERIOR LIGHTING AND HORN SYSTEM
55-1-167