Anschaltung von Steffen
Holz, Starten mit der Bremse
From: Martin, Guildford
on 02 February 2001 at 11:02:52 (UK time)
If you look at the top left hand corner of the ignition switch page on the F diagrams, you will see the matrix of connections in each switch position. Unfortunately the terminology used in these diagrams has not been constant.
However, we have concluded the following by tracing the circuit:
Matrix labels Ignition
From tracking this labeling we can now design the circuit for the push button starter.
We need to look at what happens when we move from position 2 to position 3 of the ignition switch; so that the key is still required for the first two positions for the security and switching aspect. When we come to cranking and starting the engine; it will be able to complete this by normal operation of the key switch or by using the starter button.
Basically a single contact press to make is required for the starter button which operates a relay which has three seperate contacts (normally closed) and one seperate contact (normally open).
The starter button
will activate the relay and only when the ignition switch is in position
2 (as per the switch matrix). This then activates the single relay (though
could be a double banked relay depending on availability, costing and
material supplier). The relay will:
A recent diagram that was posted on another thread was a bit basic and certainly missed out the requirements I have noted above.
Hope this helps you all for now.