Fiesta being a PITA

[Bren]

My other half's 51 fiesta zetec has started misbehaving - the courtesy light sometimes refuses to extinguish, at the same time the door open light remains open and then the alarm goes off. This is with the doors closed.

 

A bit of investigative work on tinterweb reveals that there are microswitches on the locks which misbehave - this is the most likely fault.

 

I looked in the haynes BOL but it does'nt show you where they are - I am thinking of letting the local auto spark (excellent service and very reasonable), take a look, I would sooner save money and have a go myself.

 

Anybody fixed one of these before?

[Partridge]

My Rover 45 did something similar to me. Turned out to be borked earths.

[Volksy]

My old Ovlov S70 used to have the same problem, liberal application of WD40 into the lock, and much repeated slamming of the door tended to sort it out - for a while. It generally is caused the door used the least.

[Pillock]

I don't know if they were still doing it be 2001, but in the late 90s Ford had this weird system where if you open a door, or even the glovebox I think, 10 times in a row it goes into some sort of diag mode. Then, every time you operate a microswitch by locking or unlocking a door, the horn will make a quick beep. That way you can go round all the doors and see which one doesn't beep.

 

http://uk.answers.yahoo.com/question/index?qid=20091206165945AANc4lC

 

This seems to be the same thing on a 2000 Mondeo, you can just press the bonnet pin 8 times and it'll start doing it.

I remember triggering it by accident playing with the glovebox on my mum's 1994 Escort, it kept beeping every time a door was opened.

[fordperv]

take the interior door panel off and the microwitch is on a plastic ring clipped around the lock barrel 

 

they look like this and are sided, dont think they are serviceable, whenever ive had a faulty one i just changed it