Wiring an ignition switch.

[cyberpunx]

hi all can anyone help me out here with boat wiring. as those who have followed im trying to restore my sunken boat back to former glory. as you know i got her back from the seabed about a month ago now i am attempting to re wire her.
i have the following images of the wiring loom.
and was wondering if anyone can shed any light on it?
what are the d's for and also the numbers on the ignition 50 30 54 and 15?
i am sure i could wire her out myself as i work in the electrical industry there were just a few things i wantewd to make sure about before i try.?
i have the full wiring loom bare waiting from the engine and finishing just at the ignition switches and instruments.. i know the ignition switch has 4 terminals i will try and get a photo of what i see under the boxed bit.
but meantime any info anyone can shed on these wiring diagrams thanks in advance.
or do you know an auto boat spark in the glasgow area scotland?
if so can you ask him to contact me at mr.campbell@talk21.com
thanks

 

[carannah]

The numbers refer to Terminal designtion according to DIN 72 552

15= Positive + downstream of battery
30= Direct input from positive battery terminal 9can be through a fuse)
50= Starter control - direct
54= Trailer plug connections

The D appears to be a cable reference and refers to the colour green.

 

[VicS]

The numbers on the ignition switch are the "standard" terminal identifying code.

30 is the incoming 12 volts from the battery
54 is the supply to all the instruments and warning lights
15 is the power to the ignition system (coil and distributor)
50 is the supply to the starter motor (presumably solenoid thereon)

The key switch should be marked with those numbers. You'll notice that 15 goes to terminal 15 on the coil (via a ballast resistor) and that 50 goes to terminal 50 on the starter solenoid.


The d's? Presumably you mean D's. Just the code for green 1.5 mm sq wiring I think ( at least where it appears next to wires) Although I am surprised green is used for those


It all looks pretty simple and straightforward to me.

 

[VicS]

[ QUOTE ]
54= Trailer plug connections

[/ QUOTE ] Trailer plug ??????? It's a boat not a caravan

 

[carannah]

I am fully aware it is a boat and not a caravan. I am just quoting the numbers on the the ignition switch as listed under Terminal designation under DIN 72. It may be that the ignition switch can be used in other situations other than a boat.

In this case terminal 54 has been used for warning lights and should be wired accordinly

 

[William_H]

i don't know if you realise terminal E on the plug is a wire from the ignition points which usually goes to a tachometer (rev counter) so ignore if you don't have a rev counter.

There is a series resistor sometimes known as a balast resistor between the 12v ignition supply and the coil +ve terminal. This is to limit current through the coil. It is not always fitted to all coil types. Occasionally the resistor is bypassed when crankijng the engine to increase coil current when the starter pulls the voltage down. Apparently not so in your circuit.
Presumably you have an engine with alternator. if not I would suggest you fit one (from a car wrecking yard) alternator is far more effective. good lcuk olewill