My turn signal in mustang doesn't kick off automatically when I turn and I thought it was time to fix finally. I don't know which one to buy.
http://www.cjponyparts.com/turn-signal-wiring-reproduction-with-alternator-1965-1966/p/TSW2/
http://www.cjponyparts.com/scott-drake-turn-signal-switch-1965-1966/p/TSW24/

My car now has alternator in it. I really am not planning on paying 73 bucks for the one for 64. I was th noon ordering just the canceling cam but mustangs unlimited shows there part won't work with so order full switch. I see cj sales th cancelling cam for 64 though so idk?

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The electrical connectors for 1964.5 and 1965/66 are different so be careful buying the full switch. IDK about the cancelling cam - may be a similar issue that there is a difference. You might trying taking pictures of the current switch and the connector plug under the dash and posting them.

 

Here's some pics. Not sure if that helps.



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It looks like just the turn signal cam would be the way to go if the electrical part of your switch is working now:

http://www.cjponyparts.com/turn-signal-cam-1964-1964/p/TSC0/

 

NEITHER!!
They both are junk.
Get the original FoMoCo part at the dealership.....Its expensive but...you won't be changing it out in 3/4 years. Should last 20+ like the one from the factory in 65.
6sally6
Don't doubt me on this!

 

The switch is broken. The cam appears to be okay. You want the early switch for a GENERATOR-EQUIPPED model. The difference is in the horn as the early one has one contact for the horn button as the horn uses a ground-triggered relay. The later switch has 2 contacts and uses a "hot" horn button.