1981 evinrude 35 hp, starts, runs great, won't shut off

[vidaliaman]

just installed a new switch, black/yellow to raised M, black to M, red to B, yellow/red to S, purple to C, not using A at this time, all 5 wires going to big connector on motor, with switch on off position i can kill the motor by clipping wire onto ground on battery and touching black/yellow wire on motor side of big connector. this switch shows one of the M's needs to go directly to ground, however one wiring diagram shows that M going to the motor going through big connector, another wiring diagram shows black wire coming to switch goes to ground then another wire going from ground to M, where maybe a kill switch can be added from ground to kill switch to other M...
another note, the switch starting from B at 6:00 o'clock clockwise goes M, I, C(middle), A, M, B.... this is not what was on the directions for this switch, the direction say starting from B clockwise M, C, I, S, M, B

seems like i should be able to run a wire from the battery ground to the switch(ground)

sorry about the rambling, my brain is fried by overthinking this, what am i missing, the answer is going to be easy but i have brain fry
thanks dave
gowen mi

 

[wrench 3]

Will it kill the engine with the switch off if you run a battery ground to the black wire at the switch, and if not will it kill it if you ground the black/yellow at the switch?

 

[vidaliaman]

just ran a ground wire from ground on switch to the battery ground, also same with black/yellow to battery ground, tried to shut off and it kept running, so i had to pull apart the big plug and touch the black/yellow prong which is on the motor side of plug and it grounded it just fine shutting it down. the only thing i can think is the ground from the switch to the motor through to large plug is not grounded well, if i put my multi meter on the B and the M(ground) i get over 12.6 volts, seems like it has to be grounded,

 

[vidaliaman]

i believe i found the culprit after clearing my head i ran a ground from battery and tested motor side of large connector black/yellow to see if it would kill, it did so i tested killing the motor on the switch side of large connector and no kill, i believe the black/yellow wire is not connecting within the large connector, would you all agree?
dave

 

[wrench 3]

I think that you're on to something. It's most likely a broken wire at the terminal but you could try squeezing the female terminal a bit and see if will get a better grip on the male side.