I'm gonna replace an old keyed ignition switch on our M37 with the correct switch. the previous owner just cut the ends (4) and attached them to the switch. I don't know which wires go where in the in the new switch. ...I don't want ro burn anything up .
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replacing a keyed switch on M37
- Thread starter popz76
- Start date
ranger.41
Active member
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- Asheboro NC
Here a useful piece of info look up this site http://olive-drab.com/od-mseries-circuits.php
ranger.41
ranger.41
Mike_L
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- Marion, IN
I presume you don't have a TM for the truck. It looks like the circuit number tags are still on the wires so it will be easier to retro fit one.
Circuit 11 is your incoming (always) hot wire coming from your circuit breakers; goes to switch pin A. Later, M37B1 schematics show this also jumpered to switch pin C; early schematics show nothing connected to pin C.
Circuit 12 is outgoing to your coil; goes to switch pin D.
Circuit 27 is outgoing to your dash spider harness (powers your gauges); goes to switch pin B.
Hope this helps.
Circuit 11 is your incoming (always) hot wire coming from your circuit breakers; goes to switch pin A. Later, M37B1 schematics show this also jumpered to switch pin C; early schematics show nothing connected to pin C.
Circuit 12 is outgoing to your coil; goes to switch pin D.
Circuit 27 is outgoing to your dash spider harness (powers your gauges); goes to switch pin B.
Hope this helps.
Thanks my friend..yes, I do(did) have a tech manual but it never came back from a loan..lesson learned...AGAIN !! Anyway, I got it wired correctly by just taking my time and everything works properly now. I should have been more timely in letting eveybody know this, but this time of yr, well, things get mixed up ya know !