Most Halo headlights and taillights do not come pre-wired. This allows the user to decide which light to have the Halo function as. The most common light to connect to is the parking light, though some customers connect the light to their signal lights or stop lamps. Installing them on a separate switch is also a possibility, as is not connecting them at all.
The Halos are connected via two wires which are left bare from the Halo, one for negative (ground) and one for positive (power). The negative can be grounded or connected to the negative wire on the stock harness. The positive needs to connect to the exact function on the lamp you desire. For instance, on a turn signal/parking light there are 2 wires; one for parking light function and one to signal. Depending which function you want, you would have to determine which wire powers which function and splice the Halo power light into it. Incidentally, though we recommend using a tester, on parking/signal bulbs the parking light wire tends to have a stripe, and the signal is sometimes thicker. Unfortunately, as there are so many types that use Halo technologies, there are dierent color congurations for positive and negative. Possible color congurations are as follows:
Red (+/-)* and Red (+/-)*
Red (+) and Black (-)
Red (+) and White (-)
Blue (+) and White (-)
Blue (+) and Black (-)
* Interchangeable, just choose one for positive & one for negative
The same configurations are applicable to LED strips headlights, and headlights that include a signal bulb that must be wired to your lower parking lights (such as Chevy Full Size).