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ignition switch wiring -

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WalterWager

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my 1978 Johnson has 5 wires on the harness, Black/yellow; black; purple; red/green ; yellow red. The new switch (has 6 posts,

B, M, M, S, C, A. I connected red/green to B, black/yellow to M, the other black to M, the purple to C; and the yellow red to S. The motor cranks but I get no spark. There is nothing connected to A. Does one of the other termonal need to be jumped to A? If so which one. key position diagram that came with the switch shows RUN (B+A+C).
START (B+A+S+C) OFF (M + M). So what should connect to A?
Thanks -
 
Johnson Evinrude wiring.jpg
 
Thanks for your reply but I still have a problem. The old switch was wired black/yellow to M, a second (solid black) wire was wired to M. The purple and white choke wire was wired to C. The yellow/red wire was on A, and the red/Green on B. Only 5 wires, and it worked (until going bad).

New switch has 6 terminals M, M, A, B, C, S.
If wired like the old switch the motor cranks as soon as turned clockwise. If the yellow/red wire is moved from A to S the switch seems to work right but there is no spark.
 
I'm looking at it like you do not have a Choke wire so no C connection. If there is an electric choke is it on a separate switch?

red/grn to B
Blk to M
Blk/yel to other M
Pur to A
Yel/Red to S
 
Careful if you start guessing / moving wires.----Smoke is expensive.-----Trouble shoot components on the motor to find reason for no spark.
 
WalterWager said:
No, there is a purple and white wire connected to C and the choke solinoid works when the key is depressed (press to choke).
Click to expand...
Hi
AllDodge said:
Is it one purple/white wire or are there one purple and one white wire?

If 2 wires, purple on A and white on C
Click to expand...
Just one purple wire with white stripe for choke. The problem is the engine starts cranking as soon as the key is moved from off to on. On the old switch you turned the key one click to on (for accessories) and then pushed it down for the choke, then turned it hard clockwise to crank the engine.
 

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Here is what confuses me. If you look at the diagram it shoes the wire connections the switch is supposed to make, e.g. off connects M and M. However there is no leftmost box has no wire going to it. If you were going to label the boxes and the wires I would expect to see two wires connected for ON but there is no wire going to the left-most box. I’m pretty good at following electrical diagrams but this switch thing has me baffled. Electrically this switch checks out with the multimeter but Maybe I need a different switch for this motor’s configuration?
 

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WalterWager said:
Hi

Just one purple wire with white stripe for choke. The problem is the engine starts cranking as soon as the key is moved from off to on. On the old switch you turned the key one click to on (for accessories) and then pushed it down for the choke, then turned it hard clockwise to crank the engine.
Click to expand...
The only way this would happen is if there is the pur/wht has a connection to the start relay, which it should not.

The red/grn should be Bat voltage. No other wire should have 12V on it unless supplied by the key

In your diagram in post 11 the red/grn wire should be the second wire from the right

The left most column I think is some kind of reference, what kind I don't know
 
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