HH56 wrote:
With it failing with 3 control switches, does the leveler move in both directions if you use a small jumper wire and manually ground the solenoid wires at the control box? Touching the ground to either double terminal at the outside end on each side will bypass the limit switches and directly command the solenoids. Since you are bypassing the limit switch make sure a bar is not close to or will be driven into the center of the compensator and only touch long enough to see if it moves. If that works then you can be reasonably sure the solenoids and wiring to them is OK and you can concentrate on the limit switch or control box.

If one direction does not move by grounding the double terminal check to see if there is voltage at that same point. The way the solenoids are internally connected, they need a ground supplied by the control switch to work. At the outside double terminals you should be able to measure 12v to ground which is the voltage coming thru the solenoid winding. A solenoid coil could have failed or some have mistakenly tried to use an ordinary starter solenoid in place of the type the TL needs. Some cars have also had solenoids where water has gotten inside and corroded things to the point the plunger could not move.

If all that is good, then back to the command circuits. Control box inner contacts -- even in NOS switches off the shelf -- can oxidize from sitting and not pass enough current to bring the solenoids in. The limit switch plunger can stick keeping the switch open and the wire where it fastens to the terminal on the back of the limit switch can break. This is fairly common on the switch near the driveshaft if the wires are bundled and pulled tight. You can test them by trying the ground again at the single terminal to either side of the center green power wire.

Ross wrote:
Something is hooked up wrong or the under dash switch is facing the wrong way. There must be no power to the the center green wire in the controller when the dash switch is off.

If the turnbuckle connecting the torsion bar to the controller is way out of adjustment or the rod is bent the controller will run the leveler to attempt to bring its lever to the neutral position regardless of the car's position.

Disconnect the rod at the controller and move its arm to the neutral position. Use your solenoids or work the controller to bring the car to level. Adjust the turnbuckle to suit and reassemble.

Ross wrote:
Your compensator is adjusted to pretty much the full up position which stands to reason as the back of the car is up, and the car does not have its full weight on it yet. The short link is to the front of the car and the long link to the rear which tells me the compensator has not gone over center which is good.

First, it seems that your motor simply doesn't run as you mentioned having power to one of its terminals and nothing was happening. One of those terminals hot makes it go up, the other one hot makes it go down. You will need to get that happy first before anything else can be addressed. Take the band off the motor and snap the brush holders in and out with your finger. Then get under there with a battery or even a good strong battery charger, ground the case and power the terminals one at a time. You should get up and down. Do not run the mechanism over center so that the short link is to the rear. Report back.