1.8T AVJ battery drain

[Alan H]

Well, I've found out what drained the battery the other day I think.

I fell asleep on the sofa last night, woke at about 02:30. And I thought I'd stick my head through the curtains to have a nosey before retiring for the night.

I looked out and I could see red reflections in the windows of the houses opposite.

I went outside and found my brake lights were on!!!

Opened the car, and touched the brake pedal with my foot and they went off...

Think it needs a new brake light switch?

 

[Mike B]

thats a new one.Perhaps it will free up with some WD

 

[quattrojames]

Its quite a common failure, there's a pdf document here:

Brake Light Switch Replacement - B6 A4.pdf - Brake, light, switch,, brake, lamp,, brakelamp,, Break, lamp

 

[Alan H]

Its quite a common failure, there's a pdf document here:

Brake Light Switch Replacement - B6 A4.pdf - Brake, light, switch,, brake, lamp,, brakelamp,, Break, lamp

But would a failed one cause the brake lights to operate when my car is sat on my drive, locked up and switched off???

 

[quattrojames]

I think the brake light circuit is live with the ignition off on our cars? If so then if the switch is shorting and completing the circuit all the time it will do yes.

 

[Alan H]

I think the brake light circuit is live with the ignition off on our cars? If so then if the switch is shorting and completing the circuit all the time it will do yes.

I didn't realise that. But if that's correct then they will operate without the ignition being on..

It's an intermittent problem though, it happened during the really cold weather a couple of months back (and I put it down to the weather)

Trip to Audi on Saturday morning.....

 

[Mike B]

I would still try freeing it first whats to lose?

 

[AndyMac]

And definately don't take it to Audi!

 

[Alan H]

I would still try freeing it first whats to lose?

I'll give it a go with some silicone spray tomorrow. The trouble is because it's intermittent I won't be sure whether it's worked or not....

And definately don't take it to Audi!

I won't take it to Audi, just get the bit from Audi... What am I? Made of money!!!! lol

 

[Alan H]

Gave the switch a spray, but it made no difference.

The switch that was supplied was different to the one that was fitted. It works, but I'll upload a pic from my phone momentarily.

 

[Alan H]

The one that was fitted was like the one in the PDF file on this thread, but the one I got is like thi:

As long as it works I don't mind. I would assume the original part may have been superceded.

 

[quattrojames]

Don't forget to add the part number

 

[Alan H]

Don't forget to add the part number

Doh!!

The invoice has got: U1K2 945 511 RD W A-A061 SWITCH

 

[quattrojames]

Thanks, I'm not aware of them being a serviceable part (unless you're a microscopic electrician!) I hope it solves it.

 

[quattrojames]

Doh!!

The invoice has got: U1K2 945 511 RD W A-A061 SWITCH

Thats an unusual part number, did it come from Audi?

 

[Alan H]

Thats an unusual part number, did it come from Audi?

It did, Wolverhampton Audi. It's got the VW logo on it.

 

[quattrojames]

Probably just a common part across the whole range then, thanks.

 

[S3 GAZ]

When I changed my brake switch I got the one u got too. It was totally different to the one in the car. But it works absoloutley fine

 

[Alan H]

Probably just a common part across the whole range then, thanks.

From what S3 GAZ says it looks that way doesn't it.

When I changed my brake switch I got the one u got too. It was totally different to the one in the car. But it works absoloutley fine

That's put my mind at rest a bit.

 

[S3 GAZ]

From what S3 GAZ says it looks that way doesn't it.



That's put my mind at rest a bit.

yeh no need to worry. I bought my part from Audi Braehead

 

[Alan H]

I think it may have worked, got up this morning and the brake lights aren't on. (it's worked or the battery is very flat)lol

Will see in a moment or two when I go out to the car to go to work.

 

[Alan H]

Well it started. So let's see if it keeps it up.