Weird headlight/indicator issue - XF FalconGL

[Mr Polson 10,214]

Having a weird issue in my XF wagon.

 

I have a video to do most of the explaining.

 

The high beam relay buzzes when high beams are on. Tried swapping out the relay, doesn't change/fix it.

Tried another headlight assembly (in vid), same issues. Only difference is headlight is dimmer on low beam when using factory headlight.

 

 

[SLO247 1,713]

Dodgy switch/connection or wiring somewhere. Sorry I can't help more. I know why you asked about the stalk now, thats possible too. I'd try swapping them first.

[Mr Polson 10,214]

I'll try swapping the stalk, I don't have another switch though, this is my only GL

 

The connection for the headlight is a bit rusty, so the terminal on the harness could be a bit corroded too. Any way to get in it and clean it? Or just spray it with WD40?

[Valvebouncer 2,389]

Check your earth connections, just as important as positive connections and usually overlooked.

[gerg 10,871]

Looks like earth problems right there. The dull glow of the other lights says a lot. Is it one light or both?

 

A crook relay can do funny things too

[Mr Polson 10,214]

The main earths seem fine.

 

Should both headlight looms have an earth to ground or just the passenger side?

 

Its just the drivers side light affected gerg.

[Mr Polson 10,214]

Okay all earths are where they should be.

 

I've been told it could be the wire between the headlight and the earth, how do I test that?

 

I have a multimeter, but about all I know how to do with it is check voltage across a battery lol

[Justo 1]

did you end up figuring it out because mines doing the same thing but with a xe wiring harness in a xf and we came down to the oil pressure wire was crossed with a high beam wire but not sure where yet

[Outback Jack 6,352]

Its a short, if ya can grab another stalk, bet it's that. The switches go in these after years of abuse, but it may also be in the loom.

To test for a bad earth you use resistance on the mutimeter..... the upside down horseshoe symbol.

 

Set the multimeter to about 2K and just measure resistances on earths on both sides, should be close. Also you can spin the dial to same one you measure battery voltage with and check the positive wires voltage, this is VERY handy for fault finding in wiring.

 

Sometimes on the old XF's it was even the lamp globe had a dodgy connection where it joins at back of headlight.

 

Theres a black wire from back of headlight, with multimeter on "Ohms" (upside down horseshoe shape) , you put one lead on that and one to body of car, if headlight gets brighter you have an earth problem.

 

Hope that helps, Jack.

[Mr Polson 10,214]

My issue ended up being the battery terminals, it had the factory style bolt through the terminal, I changed it over to the more modern type that go over/around the terminal, and no more headlight issue.