Preparing the column

As it's cold this week, I've decided to start preparing the wiring. First job is to sort out the column's wiring loom.

With all the tape removed

Ignition wiring

The colours are as follows:

Wiper wiring

They have individual numbers, and since there's 3 white/black cables, I've indicated the cables in the back of the switch with the numbers.

These are based on the wiring diagram in the Haynes manual - wire 4 is meant to be white/green, and the intermediary speed doesn't appear to do much (on my Mondeo, there's a control for the speed).

Indicator wiring

And here, the colours are.

Horn

This is a simple switch - although when I replace the steering column, it may not have a horn.

What am I going to do?

What I want to do is use a PIC microcontroller to handle a lot of the work of turning things on/off.

It will have as inputs:

1. Slow wiper input
2. Fast wiper input
3. Intermediary wiper input
4. Wiper motor switch
5. Dip light switch
6. Side light switch
7. Ignition power

Its outputs will be:

1. Slow wiper output
2. Fast wiper output
3. Dip light output
4. Side light output
5. Dim/Dip output