One only seems to discover the
Achilles heel of a particular model of a second hand car once
you've parted with your hard-earned cash.
My Rover 820 had an oil leak
right at the front corner of the engine block where the head
bolts on. It seems that most Rover 820s have this weakness but
I didn't find out until I asked a local garage to quote me for
a repair. They declined; saying that any repair would be only
Now to the Peugeot 206
Why not simply check what is happening using an electrical test meter? Just check the state of the contacts?
Access to the wiring, alas, is tricky.... however at each door there is a small wiring loom that passes from the car body to the interior of the door. When you open the door fully then prise away the rubber cover you can see a connector. This carries four speaker wires, a ground connection, a couple of wires for lock motor power and two wires for contacts, one for Door Closed and the other for Door Locked.
By measuring the resistance between ground and each of these two contacts one can see if they are working correctly. Resistance between ground and the Door Closed contact should be close to zero ohms (when the door is closed) and that of the Door Locked contact (when the door is locked) the same.
If the door doesn't stay locked you should be able to see the resistance change to a low value before increasing again to something pretty high.
In my car the driver's Door Locked contacts measured as they should. To make things easier to measure the Door Closed contacts one can push the door lock lever into the closed position with a screwdriver rather than actually closing the door. This is actually essential as one needs the door to be open to make the measurements.
On my car, the driver's door wiring
at the cable from the car body used a green/yellow ground wire
and a pair of orange wires for the two contacts. The passenger
door used different colours. The same ground wire colour but
a pair of purple wires for the two contacts. Four door cars may
use different colours again?
As the motorised lock unit is sealed
(making investigation and repair quite tricky) the easy solution
is to cheat and make the controller think the door is closed,
even when it's not.
Which wire, as in my car there are two
purple and three orange?
Connect the centre orange or centre purple wire to the green/yellow wire. You can do this by carefully baring the sleeving for a short distance and connecting the two wires together, either directly by twisting together or, as I did, by using a short length of thin wire. Take care to insulate the bare areas before inserting the cable back through the hole into the car body and refitting the plug etc. Test as you proceed and before you reassemble everything...
If you've done the job correctly the doors should lock with a clunk and the indicators will flash.