Are Demon Eyes Generally Connected to Parking Lights or Daytime Running Lights?

[SanEvan]

Demon eyes are generally connected to parking lights. Demon Eyes: Demon eyes are actually a colloquial term for small LED lights, often appearing together with angel eyes, which are the colloquial term for BMW's daytime running lights. The name 'demon eyes' comes from their resemblance to the eyes of a demon, as demons are often depicted with blood-red eyes. The earliest demon eyes were red, but later versions came in blue, purple, green, yellow, and other colors. Function of Demon Eyes: Demon eyes are usually connected to the parking lights and serve as position lights. When the parking lights are turned on, the demon eyes will light up as well. Of course, some people prefer to connect them to the daytime running lights, so they illuminate as soon as the car is started. Another function is to use them as ambient lighting. Some cars do not have factory-installed ambient lighting, so placing a demon eye in the footwell area can serve as a footwell light.

[GenesisDella]

I researched this when installing the devil eyes before. The aftermarket parts supplier recommended connecting it to the parking lights. The reason is that devil eyes are decorative lights that look cool when lit at night. Since parking lights turn on automatically at night, synchronizing with the devil eyes is just right. Daytime running lights stay on during the day, so connecting to them would make the devil eyes less visible and waste power. Also, when modifying the wiring, avoid the engine control module to prevent triggering fault codes. It's best to use an independent fuse for the wiring, not drawing power directly from the original car lights. My car has been connected to the parking lights for three years now, and when unlocking at night, it still does a breathing gradient effect, which feels especially cool. Regularly check the wiring connections as they can oxidize easily in rainy weather. Remember to choose low-voltage, wide-voltage LED bulbs for better stability.

[McLily]

As a night driver, I personally recommend connecting the demon eyes to the parking lights for better practicality. Daytime running lights are effective during the day but too bright, making the demon eyes less noticeable. Connecting them to the parking lights allows the demon eye design to be visible when the lights automatically turn on at dusk. During installation, use a multimeter to accurately identify the positive wire of the parking lights, usually the gray one. Don’t cut corners when routing the wires—run them along the engine cover’s waterproof channel to prevent short circuits. Recently, I’ve seen some car enthusiasts connect the demon eyes to the ACC line to keep them constantly lit, but I’ve tried this and found it drains the battery quickly, so I don’t recommend it. Also, pay attention to the light housing’s seal—demon eye bulbs generate more heat than stock bulbs, and poor sealing can cause fogging.

[OAlice]

From a safety perspective, it's best to connect the demon eyes to the parking light circuit. Modified lighting should not affect the functionality of daytime running lights (DRLs), as DRLs are crucial for driving safety. Connecting to the parking lights allows for completely independent control - they can be turned on when needed without causing issues. Last time when helping a friend with the modification, I found that on older models the parking light wire is located at the third pin of the headlight connector. Properly sealing the wiring harness connections with heat shrink tubing is critical, otherwise vibrations may cause disconnections. Actual testing showed that connecting to the DRL circuit would keep the demon eyes constantly illuminated, making the design hard to see in daylight. After modification, always test the light angles in a closed road section to ensure they don't glare into oncoming traffic.

[SanAdriana]

A friend who's into car modifications told me that 90% of demon eyes are connected to the parking lights. The main consideration is synchronization - it looks coordinated when the demon eyes light up with the parking lights. Don't connect them to the position light wires as insufficient current may cause flickering. It's recommended to use three-core waterproof connectors for the connection, which are both secure and convenient for future replacements. When I helped my cousin modify his Fit, I found that connecting to the daytime running lights would interfere with the car's automatic headlight sensor, causing confusion in the lighting logic. Additionally, connecting angel eyes to ACC is acceptable, but there's really no need to keep decorative lights like demon eyes constantly illuminated. When choosing lights, pay attention to the consistency of the LED colors - don't buy cheap ones that might have different color temperatures on each side.

[DelAniyah]

Based on collective experience, it is recommended to connect the demon eyes to the parking lights rather than the daytime running lights (DRLs). The parking light circuit is simpler and more stable, and its usage scenario is a better match. DRLs are safety equipment, and connecting additional lights to them carries risks. During installation, first remove the lamp cover to locate the wiring harness, then use a test light to identify the +12V constant power wire (connect to the positive terminal of the demon eyes), and connect the parking light trigger wire to the control terminal. Pay special attention to ensuring the grounding point is thoroughly cleaned and connected to a reliable metal part of the vehicle body. After installation, inspect the wiring annually for signs of aging, especially in high-temperature areas of the engine compartment. For those seeking customization, an independent switch can be added, but be careful not to interfere with the vehicle's original electrical circuits.