i have a sierra brake master cylinder with a float sensor with three connections on the top.

the vicky green wiring loom i have has two wires

how do i wire it up so it works?

is there another float sensor that i need?

Ditch

You will find that 1 wire is a common and the other 2 are switched - either one of these will do the job.

If you have a test meter (or a test light) find a pair of wires that give a connection when the cap is in its normal state (i.e. with the float downward) and an open circuit when the cap is inverted.

David

Mine a MK2 escort but I think the principles are the same, power goes to the bulb, then one of the wires goes to the switch on the m/cyl, the other wire then returns to the handbrake switch to act as a bulb test, the third wire on the master cylinder goes to earth & so earths out the bulb when you have no fluid, loads of people just wire up the handbrake bit, thinking the lamp is a "handbrake on" warning light, but the day they run out of fluid the true use of the lamp will not work.
good luck

I point you to here:

http://locostbuilders.co.uk/viewthread.php?tid=39092

The top of the M/C lid is also a test button. Press the black dome and a switch underneath it clicks, easier than taking the lid off to simulate low fluid. You don't need a handbrake warning light for SVA if you don't want to wire one in, just look at the lever to see if it's on .

[Edited on 15/5/06 by Peteff]

IIRC its the 2 outer ones?? I think thats what my VG wiring diagram says..

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You don't need a handbrake warning light for SVA if you don't want to wire one in, just look at the lever to see if it's on

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