Bonnet open switch dangling

[multigrade]

This switch is just sitting there on the left-hand side of the engine bay, behind the fake firewall near the battery. It has two wires attached to it but it isn't physically mounted anywhere. I'm suspecting it was part of an alarm system that's since been removed - there's a clue in the form of a small socket on the dash with a handful of pins but which doesn't do anything.

Might there be another reason for its existence?

 

[Snake Charmer]

I suspect you are correct, certainly not original fitment wiring with the Pearly Wotnot terminals crimped on. The bracket does look well made though.

 

[multigrade]

I suspect you are correct, certainly not original fitment wiring with the Pearly Wotnot terminals crimped on. The bracket does look well made though.

Can't help wondering where those wires go....

 

[mioba]

follow the wires

 

[sonic]

Can't help wondering where those wires go....

To the control unit to trigger the alarm when activated.

 

[multigrade]

Yes... But since there's no control unit any more, and the wires disappear into a loom. I'm just curious: they clearly aren't attached to anything that matters.

 

[sonic]

Yes... But since there's no control unit any more, and the wires disappear into a loom. I'm just curious: thet clearly aren't attached to anything that matters.

I would chop the connectors off the cables then tape them up separately. Cant do any damage then.

 

[mioba]

if they are nor connected to anything take them out completely.

 

[Snake Charmer]

I would find out where they go to and see if any factory seals have been disturbed letting water in.
I would also follow the two hefty black wires with the blue ring terminal earthed on the strut turret and see where they go and remove the ring terminals from the positive junction box that are snipped off.

 

[multigrade]

I would find out where they go to and see if any factory seals have been disturbed letting water in.
I would also follow the two hefty black wires with the blue ring terminal earthed on the strut turret and see where they go and remove the ring terminals from the positive junction box that are snipped off.

View attachment 85478

Good plan, I'll do that.

 

[mioba]

Also you have 2 cable/ connected to the battery pole LHS as you look at the pic - somethings been added. clean up the earths and some peteoleum jelly

 

[multigrade]

Thanks, yes, I've not had the car long and there's plenty to do!

 

[multigrade]

Interestingly, I've just stumbled across this image, from the online maintenance manual from the w124performance.com site. Seems to show the switch in situ, suggesting it's an original part - even if the wiring isn't. The page in question is 54-1255, and refers to the location of fuse boxes.

 

[mioba]

W124 alarms were not a factory fit.
They were fitting by the dealers the time.

 

[multigrade]

I don't doubt it - still wonder why it's in an official MB publication, though maybe it's a US thing.