Headlights not working correctly

The relays swaps confirms they are in working condition.

Yes, the fault could be with the light switch.

At the light switch, ground the Red wire with a test lamp and check if the low beams comes on. If yes, the light switch is faulty. If light does not come on during this test, get an assistance to licsten for the low beam relay clicking while intermittently grounding the Red wire.

If relay clicks, the fault lies with wiring between the relay and headlamps. When you unplug the low beam relay, there must be two terminals that are hot at all times.

Hi there,

Not to sure about the distance you have to drive as I am in Aust. But I feel that the problem my be in the alternator and it may be over charging, this is a simple thing to have tested and if this is the case it will just be an alternator '/haul, I would have this check first.

Mark (mhpautos)

A normal DIY guy should be able to handle it but if vehicle is equipped with air bags, care must be taken to avoid damage to the spring reel under the steering wheel.

You would have to remove the steering wheel and column cover to get at the light switch if it is for removal. For testing, removal of the steering column cover should do. There are a few attaching screws and after removing them, you should be able to pry the covers apart to get them out.

From there you should be able to perform the test.

Power to the bulbs are via the headlight relays as shown in schematic. The relays are activated by the light switch and you need to check the various fuses, ensure the relays are being activated when the light switch is turned on.

Use this guide to check for power with the wiring diagrams below for the headlights.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (Below). Please let us know what happens.