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Author Topic: MSD + master battery switch ?  (Read 2344 times)
Sepi
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Posts: 102
« on: August 29, 2014, 11:38:02 am »
My new 2332 is so happy running engine and doesn't want to stop from ignition switch at all. Cutting off with a two pin main switch is not good for alternator, so I have now the FIA approved with 4 other pins. Before I'll do anything serious, please advise me and tell how to make wiring and connections right with MSD 6 AL.

I have done the MSD wiring like the picture above and I supposed to do the main switch wiring like it is shown under - sorry for the poor quality of the pic.
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Erlend / bug66
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« Reply #1 on: August 29, 2014, 17:21:38 pm »
It will not stop (if you wired after msd's direction because it's connected directly to the battery with +/-

You could run one of those wires through a cut of switch.
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Lanny Hussey
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Posts: 217
« Reply #2 on: August 29, 2014, 17:38:57 pm »
You need to install a diode on the alternator field(idiot light) wire. MSD has instructions for this.
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1967, the only year that matters.
Sepi
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Posts: 102
« Reply #3 on: August 29, 2014, 18:54:38 pm »
Quote from: Lanny Hussey on August 29, 2014, 17:38:57 pm
You need to install a diode on the alternator field(idiot light) wire. MSD has instructions for this.

I was told with a PM that ignition light gives a route for MSD to get a current and I'll test that.
BTW, which way do I connect the diode if I connect it on the signal cable of alternator - going to alternator or coming from?
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MattiK
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« Reply #4 on: August 30, 2014, 07:01:42 am »
You cannot put the diode on signal cable. The current must flow in both directions.
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Sepi
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Posts: 102
« Reply #5 on: August 30, 2014, 07:09:49 am »
Quote from: MattiK on August 30, 2014, 07:01:42 am
You cannot put the diode on signal cable. The current must flow in both directions.

... I was thinking about too easy way... Embarrassed
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