unknown knob found!

Post by **Roli** » Thu Aug 20, 2009 8:54 pm

Hello,
Please forgive my naiivity - despite a moggy being in our family for decades, I never took a huge amount of notice of the hidden workings, but this morning I, very exitedly, collected my very own moggy. There are a few niggles, but nothing we can't source and fix ourselves, but I have a query regarding a strange knob I found lurking in the shadows.

In the are under the steering wheel, near the bonnet pull and almost flush to the wall to the engine bay, is a small black knob with a red dot on it. I cannot for the life of me fathom what it is for and was hoping that someone would be able to help me.
I inherited a partial copy of a 1975 Haynes manual with the car but cannot find it in there.

If you can help me unravel this mystery I would be most grateful!
Thankyou in anticipation!
Roli

Post by **LouiseM** » Thu Aug 20, 2009 9:09 pm

Hi Roli, welcome to the forum

. What year is your car? I don't know much about early cars but I've never seen a knob like that on a later car. Is it possibly a type of after market engine cut out put there for security? If you look in the engine bay can you see if anything comes out that side such as a wire etc?
Lou

Post by **bmcecosse** » Thu Aug 20, 2009 9:12 pm

Welcom indeed! No idea about this knob - it's not original. As LM suggest - look to see what's on the other side!

Post by **alanworland** » Thu Aug 20, 2009 10:24 pm

I suspect some sort of immobiliser?

Post by **bigjohn** » Thu Aug 20, 2009 11:31 pm

bmcecosse i would love a download of the wiring diagram if you have one please im having big trouble withe horn and indicators

Post by **Sidney'61** » Fri Aug 21, 2009 11:45 pm

It is probably an immobiliser, try and follow the wires and see where they lead, it is quite likely that they lead to the fuel pump.

If you can't trace the wires then just disconnect the fuel pipe from the fuel pump (the solid, copper coloured one) and turn on the ignition so that it clicks continuously, then flick the switch and see if it stops......just a thought.

Post by **andrew.searston** » Sat Aug 22, 2009 6:28 pm

what andy says!!!!!

Post by **Roli** » Sat Aug 22, 2009 7:38 pm

Traced it........... to a switch in the engine bay that appears to have been there forever, but is not attached to anything!

Post by **Peetee** » Mon Aug 24, 2009 11:04 am

Perhaps it leads to a hinged, sprung-loaded rubber mallet above the fuel pump.

Post by **Sidney'61** » Mon Aug 24, 2009 9:26 pm