High beams not turning off

[MightyMirageMpg]

Completely agree with fummins it's like you have two separate issues.

The 406 connector contains the ground for the relay coil so disconnecting it powering off the relay suggests the relay is functioning?

If it were my car this is what I would do, after disconnecting the battery

For the load side and dismount the relay box under the hood and pop the bottom cover off, see if something chewed up the wires in there or if theres a printed circuit board in there that the relays and stuff plug into make sure it's not delaminated or signs of carbon tracing, black spots etc

If you want to look at the control side of things, ide disconnect c407 which looks to be the main plug in for the etacs ECU too the junction box and look at it. This actually seems like the most likely culprit right now except for the fact the lights stay on with the relay pulled

You could also disconnect c10 which is the data connector from the switch too the etacs ECU and see if the light goes off.

Fummins makes a good point that resetting the system makes a change, but I would personally start on the load side just because it's easier to understand and access.

[AyAyron]

Thanks for the step-by-step process Mighty, will try and report back. I doubt I have the tools to dismount the box but let me see what I can do.

[AyAyron]

Hey Mighty, I have a RHD and the C10 in the diagram seems to be in the steering column. Is this where I should look for it? So far the other locations have been the same: i.e. junction box and kick box on the left hand side (in my case, passenger seat)

[MightyMirageMpg]

Ya I wouldn't dig for that. It was a way to see if the switch was commanding the light to go on. Possibly a fuse you could pull to get the same result. Still doesn't explain the relay thing which seems rather... odd..

There's got to be a way to get into the computer and read the command values. I don't know how to though hopefully someone smarter will chime in and teach us both.

[daleWV]

In post #6 of this thread the OP stated that one of the aftermarket additions that came with the car was "led strips parking lights".
Barring the possibility that some wires have rubbed through and shorted together somewhere, I would be highly suspicious that these "led strips parking lights" could somehow be involved with the high beams being on even when the high beam relay is pulled. Just saying.

[7milesout]

... Just saying.

For a friend?

[Fummins]

In post #6 of this thread the OP stated that one of the aftermarket additions that came with the car was "led strips parking lights".
Barring the possibility that some wires have rubbed through and shorted together somewhere, I would be highly suspicious that these "led strips parking lights" could somehow be involved with the high beams being on even when the high beam relay is pulled. Just saying.

Reading is hard.

[AyAyron]

In post #6 of this thread the OP stated that one of the aftermarket additions that came with the car was "led strips parking lights".
Barring the possibility that some wires have rubbed through and shorted together somewhere, I would be highly suspicious that these "led strips parking lights" could somehow be involved with the high beams being on even when the high beam relay is pulled. Just saying.

Hey, the led strip parking lights are directly connected to the wiring to the stock parking lights via a splice in the parking light supply wire.

To Fummins: the fuse picker snapped on first try I used a small flat head screwdriver to pry them out. The fuses do NOT turn off the high beams (just like the relay).

Quick update: I went to a mechanic who reset the codes. Now my SRS light is permanently on (better than having high beams on haha). I am going to try someone else this week who has agreed to look at the wiring for me.