Recently, we had issues with headlights on the 2006 Tribeca. One problem was solved by replacing a bad wire going to the + voltage for the passenger high beam headlight.
Then, we found that we had + 12 volts on each of all of the light bulbs at the correct time.
The high beam lights were great.
The low beam light bulbs were nice and bright but did virtually nothing to light up the road in front of the vehicle. Simply, there was very little light projection from the light bulbs.
We ended up disabling the day light driving bulbs (low beam headlights running at 1/2 power) by pulling the blue and yellow wire from the connector going to the DRL module that is well buried up under the dash of the vehicle.
So, now that we had the DRL lights disabled, we decided to put HID light bulbs and ballasts in for use as the low beam head lights that simply did not light up the road with conventional light bulbs.
We added isolation relays fed by heavy wire and fuses directly from the battery. The coil of each relay was activated by simply connecting the vehicle low beam light bulb wires to the relay coil wires.
Then, the solid 12 volts was connected to each light bulb from each relay through the relay set of contacts.
When we turned on the lights, NOW we had light to light up the road.
No question, this 2006 Tribeca low beam lights really are many times better by the use of the Hid light bulbs and ballasts. By disabling the DRL lights, the HID lights will never see low voltage and thus, the bulbs should have much longer life, than if being driving by partial power.
If you have such a vehicle and don't like the low light level of the low beam lights, try the HID solutions. It works.