~ Tech - Electrics ~

Some shocking tips on getting your electrics sorted. More to come when I can source them.
 

Alternator

Ford Alternators have a 3 wire connector on the rear casing.  They are wired as follows:
Two large wires can either go directly to the Battery, or (which can be more convenient) to the Starter Motor's main connector.
One small grey wired (sometimes blue), goes to the Ignition bulb which is then wired directly to a fused Live feed.

How it works:
The current that goes through the ignition light circuit feeds a small 3-5 amps through to the slip rings into the rotating field windings. This pproduces a rotating magnetic field.
This field 'cuts' the static windings inducing an AC current in them which is then rectified to DC and regulated to 15 ish volts max to charge the battery.
No field current, no magnetic field, no output. Once charging, voltage on both ends of the ignition light circuit become the same so there is no flow of current and the light goes out.
 

Wiring Diagrams

Click on the link above to see an example of a wiring diagram for my Westy.  This is a home made loom which includes a Starter Button, ETB Instruments and VDO sender units.
* There are now 3 ways to view it including a Zoomable verson.*
It may be of some help if just wiring up some of your cars bits & pieces, OR if you want to wire the whole car, it can be used as a guideline. If you would like a copy for editing purposes, I can email it to you in Visio or Cad format.
I am not an Auto Electrician so I take no responsibility if you decide to use this diagram or any part of it.

How to Wire a Car

Here is a link to the Car Constructors Website on How to wire your car, giving wire amp rates, and much more.  It's a very helpful guideline.
 

How to wire an Electric Radiator Fan


The Link above shows a simple diagram of how to wire up an Electric fan for a Radiator using a Relay.


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