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
The colours are as follows:
|Red||Permanent 12V supply (through immobiliser)|
|Red/yellow||Power off feed|
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.
|4||White/black||Normally connected from R15|
|Ignition power feed||Purple/orange||8|
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).
And here, the colours are.
|Purple/yellow||Main beam power|
|Purple/orange (1)||Dip beam power (input)|
|Purple/orange (2)||Permanent power (for flash)|
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:
- Slow wiper input
- Fast wiper input
- Intermediary wiper input
- Wiper motor switch
- Dip light switch
- Side light switch
- Ignition power
Its outputs will be:
- Slow wiper output
- Fast wiper output
- Dip light output
- Side light output
- Dim/Dip output