THQ taillight problem

[The Flying Scotsman]

Is your new headlight switch an aftermarket 'Auto' one with it's own sensor on the end on a wire? They can be very hit and miss. We had one in the Polo, but after a few weeks it went in the bin.

I’ve removed the aftermarket light switch and even bought a genuine VW one with the double fog light.
When that didn’t help I stripped out the fog light wires and pin connector I’d fitted in the light switch plug. Then fitted the original light switch.
Still didn’t help.

 

[The Flying Scotsman]

Sounds like the BCM is dropping the sidelights for some reason, maybe excess current for the THQ headlights causing it to overheat, or maybe not comparable with the LED bulbs.

The LED bulbs are the ones supplied by THQ with the V3 headlights and the rear LED lights are THQ also. Both meant to be plug and play with no faults.
I’ve fitted the original rear lights and still get the problem so it’s definitely the headlights that the problem is coming from.
I’m going to have to check the headlight loom to see if it’s been tampered with or something connected to it.

 

[The Flying Scotsman]

I’ve finally got this problem sorted.

After refitting the original rear lights, side indicators and light switch and disconnecting the DRLs and fog lights. I was still getting the problem.
Everything would work fine on start up then after 5 mins the bulb out light would come on on the dash and the main rear lights would switch off.
I took it to the local auto sparky who is an old school friend and he spent about an hour on it checking everything and found out what was causing the problem.
Unbelievably it was a blown interior/ parking light fuse.
Why that affected the main lights is unclear but the problem is now gone after replacing the fuse.
So today I will be refitting my LED rear lights then indicators then one by one hooking up the fogs and DRLs.
Hopefully get back to full on spaceship front end and cool smoked LED everything else soon

 

[The Flying Scotsman]

That’s Scooby back to her bling front end and stealthy arse.
Everything working great.
I’m a happy camper