For some reason the lights will automatically come on every time i put the car in gear when its daylight outside, but when it is dark, rainy & cloudy, i have to turn the headlights on by the head light switch. shouldnt it work just the opposite? is there a sensor or realy somewhere for this?
Yes, There is a sensor or relay for this condition.
I would check the owners manual for proper settings on the headlight switch.
The head light switch settings are correct. I would take the vehicle to a repair shop to check out the sensor .
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I have a 1997 cadillac deville that has both 'daytime running lamps' when put into gear and 'twilight sentinel' which turns the headlamps and parking lamps on at night, and goes off during the day or when it is bright enough.
There is an adjustable delay for the twilight sentinel to turn the headlights off after the ignition key is removed and it is night time.
I had the 'daytime running lamps' installed on a 1990 Cadillac Deville that turns the headlamps only on when the ignition key is switched to on with an aftermarket module. The headlamps are about 70% or so as bright as the regular twiilight sentinel headlamps and parking lights and are designed to go on during the day.
The twilight sentinel overrides this feature when it gets dark outside.
I had the daytime running lamps installed by an auto electric shop that specializes in electrical systems, alarms, stereos, etc.
There is a maxi-fuse under the hood for the headlights. Until you get the car fixed, just pull out that fuse when you shut off or don't need lights.
It could be the Body Control Module (BCM) that is causing this. Without a multi-meter and a wiring diagram, you will be pretty much lost. One needs to start checking power in and power out on the appropriate wires. Like this: there will be a wire from the headlight switch to the bcm, then there will be a wire out from the module going to the lights or maybe to the dimmer switch, but it will be the power out wire. The BCM is under the dash, probably on the passenger side.
Daytime running lights come on when vehicle put in gear separate circuit from headlight switch. You probably have a bad multifunction switch. Thats the switch with your headlights, turn signals, cruise control, etc... Have it checked by a shop to verify.
Support front wheels off ground. Chock rear tires, get an assistant for safty. Start engine (do not put in gear) step outside of car and manually turn wheels left and right by hand. Cut off engine. Turn key back to release steering lock. Manually turn wheels by hand again. If it requires the same ammount of strength to turn wheels, then Rack and Pinion is bypassing internally. Solution... replace rack & pinion.