Central Locking madness!!! - The Unofficial BMW M5 Messageboard (m5board.com)

Bader · 15th June 2004, 15:40

My central locking was "bouncing" being that it when u tried to lock it, it popped straight back up again and took 2+ attempts to get it to stay locked....

the same applied with unlocking.

it was driving me up the wall.

so i had the mechanic who has always looked after my cars have a look at it for me... he has never worked on an M5 before but hes a good lad so i dropped the car in.

well we went through everything.he was physically shocked at the amount of wiring on this car..honestly i've never seen anything like it.

we came to the conclusion that the problem was with the drivers door lock...so we stripped the door and replaced the switch....that didn't help...so we tried a new actuator...that didn't help... in the end after 2 weeks he turned round to me and said that in all honesty he couldnt work out what the hell was going on and that it would save me money to take it to a BMW specialist. (i appreciate his honesty)

so on the reccommend of a m8 up the road who also owns a 1990 3.6 M5 , i popped it into B M Tec in Manchester.

when I took it in he immediately suggested the problem was with the wiring around the hinge in the boot that becomes fraid.However when I picked her up in the evening..he said all it was , was a fuse which was the first thing he tried.

ALL THAT HASSLE OVER A FUSE!! I was astonished....

I think the lesson learnt is stick to the specialists..they know their stuff

vadas1 · 15th June 2004, 16:06

Quote:

Originally Posted by Bader

My central locking was "bouncing" being that it when u tried to lock it, it popped straight back up again and took 2+ attempts to get it to stay locked....

the same applied with unlocking.

when I took it in he immediately suggested the problem was with the wiring around the hinge in the boot that becomes fraid.However when I picked her up in the evening..he said all it was , was a fuse which was the first thing he tried.

ALL THAT HASSLE OVER A FUSE!! I was astonished....

I think the lesson learnt is stick to the specialists..they know their stuff

That's interesting. I would have thought if a fuse went nothing would work, not something that is intermittant. Did he say which fuse and why it caused what it did?

ralph (vadas1)

Bader · 15th June 2004, 16:18

Quote:

Originally Posted by vadas1

That's interesting. I would have thought if a fuse went nothing would work, not something that is intermittant. Did he say which fuse and why it caused what it did?

ralph (vadas1)

no he didn't.

i will call him and find out and hopefully have a cure for both our curiosity

sdc77 · 15th June 2004, 18:08

I had a similar problem .. and it was caused by the locking button on the drivers door rubbing against the actual top of the door where it emerged.. This was especially pronounced in hot weather when thing had expanded.
I believe the metal piece the button screwed into had become slightly bent off center.

Bryn · 18th June 2004, 10:06

Could you find out which fuse it was Si, as my car has chronic central locking issues too!!

Cheers,
Bryn.

Bader · 18th June 2004, 18:10

Quote:

Originally Posted by Bryn

Could you find out which fuse it was Si, as my car has chronic central locking issues too!!

Cheers,
Bryn.

Hi Bryn.

I asked the mechanic which fuse had gone.

He said to me to look under the rear passenger side seat.

Also check the wires around the boot hinge cos they tend to fray with use.

Hope this helps you out!

just as an aside....after having chatted with him about the car..he has told me that my beastie is drinking too much petrol and is well down on power..by a fair whack...

I know the o2 sensor may be on the blink but what else could these problems be attributed to?? it does absolutely zip all below 4000 and even then it doesnt do that much...my old gsi was up to it i think and that was 110bhp down on this beastie...any ideas?

AndyE · 18th June 2004, 18:21

It should go like the proverbial rocket at 4000/4500 rpm...

Gop-Dogg · 18th June 2004, 22:59

I have this same intermittant problem. Last time I had the car in the shop, I had the maechanic disassemble the driver's door and unhook and rehook the wires to the doorlock mechanism and actuate. This didn't solve the problem. I'm going to have him replace the fuse and actuator the next time I take it in.

Drwhizx · 1st July 2008, 00:06

Please ask your mechanic "which" fuse in particular was bad on yours....mine is doing exactly the same as yours. Takes three times to get it to actually lock or unlock.....drivin me crazzzzy!!

Thanks!!!

Alan Archer · 1st July 2008, 00:43

If you look closely at all four doors...90% of the time its an actuator.

In other words...Watch to see which door button doesn't raise or lower.
If all four don't open/close together then the system "bounces" back.

Best regards,

Alan