Ok this might be a long one but bear with me!!

Basically im trying to fit a escort mk6/7 stalk unit to my puma. I am doing this as the escort stalk system has a variable timing period intermittant wipe and the puma does not. Electrically the actual stalks are similar but the car wiring looms are obviously different and use different relays.

Looking at this pic of the escort stalk:

You can see the intermittant wipe is controlled by a variable resistor which changes between 6 ohm in position 1 and 44k ohm in position 7 and its this change in resistance that governs the time delay for intermittant wipe.

This is the escort wiring diagram:

now in essence there is an extra wire compared to my current puma which is labelled "p" on the relay and is some kind of timing wire.

Looking at the relay close up you can see this:


problem number one is i dont know enough about relays to decode the images used to represent the internal workings of the relay. can someone explain this to me so i can understand exactly how the intermittant wipe "times" each wiper sweep

Now looking at the puma wiring diagram:

Now looking at the two diagrams the circuits are similar and the stalks are similar but the puma relay seems much more complicated.

the puma relay is below:

now that doesnt tell me much as most of the wires go into a box but it doesnt show how it does the intermittant wipe timing again!!!

Sure i can perfectly understand how a simple relay is switching the circuit but dont know how the timing aspect is done again. Some form of capacitor system?? simple microchip?? so can someone decode that relay???

What im hoping to achieve is finding out how the timing works so i can wire in the variable resistor to effect the timing but obviously i need to know if the current relay can support that and also if i can wire it in series on the intermittant stalk or parallel like on the escort.

Any help would be appreciated.