Bonnet alarm switch..........

sapphireblack · Post by **sapphireblack** » Wed Jan 11, 2012 1:34 pm

.....i realised yesterday is not working, maybe it never has in five years

Does anyone know which fuse this is hooked to? It could easily be that its been disabled by the previous owner so i don't want to splurge for a new swtich if the fuse has just been pulled

X5Sport · Post by **X5Sport** » Wed Jan 11, 2012 1:45 pm

I think it goes straight back to the alarm system. Typically it would only provide a ground connection so no power and therefore no fuse required. Causes the alarm to trigger when a 'ground' is provided. At least, that's the way I think it works and matches those saystems I've played with before - which BMW being BMW may not choose to follow as a convention.

I take it you've tried the usual open the bonnet, press the lock button and after a few secs let the button go? All hell should break loose if it works. At least, that's the only way I was able to check mine Is the rest of the alarm system OK?

pvr · Post by **pvr** » Wed Jan 11, 2012 2:31 pm

Normally they fail the other way around, i.e. they "make" contact and therefor go off continually. Interesting to hear of a failure where it remains quiet

sapphireblack · Post by **sapphireblack** » Wed Jan 11, 2012 3:14 pm

I realised post battery swap i'd had the bonnet only hooked shut when the car was on semi permanent trickle charging. I'll check it again specifically with a button depress, set the alarm and then release the button. If i end up deaf i'll blame..............someone

sapphireblack · Post by **sapphireblack** » Wed Jan 11, 2012 3:32 pm

FWIW, the alarm works but the plunger is staying stuck down. A sharp upwards tug on it produces a loud noise

pvr · Post by **pvr** » Wed Jan 11, 2012 3:36 pm

And you are deaf now?

X5Sport · Post by **X5Sport** » Wed Jan 11, 2012 4:14 pm

Eh? What? Did you say summat? Nasty ringing in my ears......

Try a bit of silicone spray on the switch..

sapphireblack · Post by **sapphireblack** » Wed Jan 11, 2012 5:59 pm

[quote=""X5Sport""]Eh? What? Did you say summat? Nasty ringing in my ears......

Try a bit of silicone spray on the switch..[/quote]

Tried that at the same time but it's like it's two stage notched. I'll need to enqure about replacing the switch

X5Sport · Post by **X5Sport** » Wed Jan 11, 2012 6:55 pm

Short of pumping it in and out a few (dozen) times to see if that makes it smooth out, I guess you're right. Having sold the car I can't look at mine for comparison, but I suppose it can't be taken to bits and cleaned can it?

storminmike · Post by **storminmike** » Wed Jan 11, 2012 7:53 pm

[quote=""sapphireblack""][quote=""X5Sport""]Eh? What? Did you say summat? Nasty ringing in my ears......

Try a bit of silicone spray on the switch..[/quote]

Tried that at the same time but it's like it's two stage notched. I'll need to enqure about replacing the switch

[/quote]

Â£10.40 including VAT.......replaced mine when the alarm kept going off

sapphireblack · Post by **sapphireblack** » Wed Jan 11, 2012 10:32 pm

Good to know, thanks.

millerman1ac · Post by **millerman1ac** » Sun Jan 15, 2012 1:52 am

[quote=""storminmike""][quote=""sapphireblack""]

Â£10.40 including VAT.......replaced mine when the alarm kept going off[/quote][/quote]

same easy job!!

x555 · Post by **x555** » Sun Jan 15, 2012 10:37 am

[quote=""sapphireblack""] A sharp upwards tug on it produces a loud noise

[/quote]
Ooo eerr misus

[quote=""X5Sport""]Short of pumping it in and out a few (dozen) times to see if that makes it smooth out [quote]
come on now gents lets keep this forum clean now

Rusty · Post by **Rusty** » Mon Jan 16, 2012 12:06 am

[quote=""x555""][quote=""sapphireblack""] A sharp upwards tug on it produces a loud noise

[/quote]
Ooo eerr misus

[quote=""X5Sport""]Short of pumping it in and out a few (dozen) times to see if that makes it smooth out

come on now gents lets keep this forum clean now

[/quote][/quote]

Funny, only you picked up on that. Pmsl

Sent from my iPod device using Tapatalk

sapphireblack · Post by **sapphireblack** » Thu Jan 19, 2012 6:09 pm

All of Â£10.18p incl VAT and postal delivery. Five minutes under the bonnet and all is good. If only more BMW issues were as easily and cheaply resolved

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