Exterior Lighting

EXTERIOR LIGHTING
The low and high beam headlamps are controlled directly by an output from the Central Timer Module (CTM). The park lamps and fog lamps (on vehicle so equipped) are controlled via external relays that are energized by the CTM. The headlamp switch provides the control signal through the multi-function switch to the CTM, which indicates low or high beam operation.

The Optical Horn (Flash to Pass) feature operates both the high beam and low beam headlamps.

The CTM provides the Headlamp Time Delay feature. To start the delay, turn the ignition off while the headlamps are on. Then turn the headlamp switch to the off position. This has to be done within 45 seconds of the ignition being turned off. The headlamps will remain on for 60 ± 5 seconds. If during this delay period the headlamp switch is turned on and then off, or ignition switch is turned on, the delay will be canceled and they will turn off immediately. During the delay period, only the headlamps are turned on and the park lamps/fog lamps are turned off.

The CTM also provides battery protection to avoid wearing down the battery if the customer leaves the park lamps or headlamps on for extended period of time with the ignition off. If the park lamps or headlamps remain on for more than 5 minutes while the ignition is off, the headlamps and park lamps shall be turned off and the input causing the lamps to be on will be ignored until the input is corrected. Once the 5 minute timeout has extinguished the headlamps and park lamps, any change in the ignition switch, headlamps switch or park lamp switch will reset the 5 minute timer and return the headlamps and park lamps to normal operation. A 15 minute timeout is initiated when the ignition switch is off and the headlamp switch is cycled from off to on.