Test A (Fuse, Dimmer Switch, Power Relay, Amplifier, Driver Control)
- If headlights remain in high beam for both positions of dimmer switch, remove high/low beam relay from connector. Connect a test lamp between battery and Violet wire of connector. If lamp does not light in both positions, replace relay.
- If lamp does light in both positions, remove dimmer switch connector. If lamp remains lighted, check for a short in circuit. If lamp goes out, replace dimmer switch.
- Disconnect sensor-amplifier cable at in-line connector. Connect voltmeter between ground and White wire terminal. With control fully clockwise and headlights on, meter should read battery voltage. In fully counterclockwise position voltmeter should read 0 volts. If voltage differs, replace control.
- With headlights on, sensor exposed to light and dimmer switch in automatic position, disconnect sensor cable at in-line connector. If headlights return to low beam, replace sensor-amplifier. If not, replace dimmer switch.