High beams not working

Hi,

I need to start from the beginning. Take a look at the attached pic (1). Confirm the fuses I highlighted are good. In addition to being good, confirm there is power to and from the fuses. Also, switch the relay with a good one having the same part number.

Here are two links that you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

and

https://www.2carpros.com/articles/how-to-check-wiring

Pic 2 shows fuse location.

Let me know what you find. Remember, you have to confirm there is power to the fuse and out from it.

Take care,
Joe

Okay, if the fuses, relay and all wiring is good, then you need to check for power to the light or where it's being lost. When you have the high beam on, the relay sends power through fuses 1 and 2 directly to the lights. So if there is power out from the fuse, there has to be a break between the two locations (fuse and light itself). Is there power to the light socket? If there is, then check the grounds. See pic 1.

If there is no power, then you will need to trace the power supply wires between the fuse box and the lights to see where power is lost. This isn't something that normally happens at the same time on two separate circuits. Did anything happen (accident, repairs) that could have caused problems for both lights?

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know.

Joe

Think about it. If there is power to the lights (checked at fuse), the ground is good, and the bulb is good, it should work. We are missing something. Please recheck that there is power to the light socket from the known good fuse and make sure there is continuity to ground from the light connector. One of them has to be missing. I assume the bulbs are known good.

Let me know.

Joe

Okay, I thought there was power at the fuses. So, I need to confirm which pins you are jumping. Take a look at the attached pic. I highlighted two pins from the relay. Are those what you are jumping? If so, go back to the body control module and check for a good connection at the black/white wire. That is how the relay is actuated to allow power to pass the pins I highlighted.

Let me know.

Joe

As far as the BCM, on this vehicle, the BCM provides a ground path from the relay. There is power at the G19 connector at all times. Confirm that to be correct. If it is hot, then you need to see if the BCM is providing a ground path for the relay to actuate and make the connection between G20 and E19. To check for a ground path, check continuity to ground via the BCM.

Let me know.

Joe

Hi,

Very possible or the BCM itself. The relay needs a good connection to the BCM to complete the circuit and actuate the power through the relay and turn the lights on.

Yes, the completed circuit would turn the light on. Is it working?

Joe

There has to be a break down between the BCM and that relay.

The best way to test a wire is to see if there is continuity from one end to the other with very little resistance. You will need a multimeter to do is and set it on ohms to check.

Continuity simply means there is a continuous flow of electrons through a conductor. In this case, the wire is the conductor and you need to confirm power makes it from one end to the other.
Joe