How to troubleshoot my overdrive?

Posted by Jay Faubion On 2008/7/4 13:50:04
I have a 1949 22nd series. It has overdrive, but the overdrive has not worked since I got the car and began working on it. It runs so well otherwise at this time that I have saved the overdrive for last.

The overdrive will not engage. Here's what I know:

* The dash indicator lamp does not light.
* The car free-wheels at driving speed when I let off the accelerator.
* I don't see a reverse lockout switch anywhere near the shifter shaft.
* There is no voltage on either side of the kickdown switch.
* The lockout switch under the dash is open (6v on one side only), and the cable is pushed in (forward).
* The overdrive relay has three terminals: 1 on the left, two on the right.
--- One of those on the right is marked 'SOL'.
--- There is a fuse block mounted on the front.
--- Both sides of the fuse have 6v.
--- None of the three terminals show any voltage.


You can see the relay and switch here.

Any troubleshooting help anyone can offer will sure be appreciated!

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