Re: '56 TL issue, where to start

Posted by HH56 On 2014/10/18 21:22:01

Before driving the motor directly, I had disconnected the small compensator lever rod and moved the lever by hand, back and forth, with no TL motor engagement.

Am assuming you waited the amount of time for the delay when manually moving the lever? If so, I would verify you have 12v to ground on the light green wire in the center of the row of terminals at the switch. If that is not present the switch won't work. It is supplied thru two fuses, the brake light switch, and the under dash on/off switch. The fuses are the ones located near the solenoids.

The solenoids need a ground to operate which is supplied by relays inside the control switch. To test the solenoids and that part of the circuit directly you can use a jumper wire to ground either of the outside terminals at the control switch. Just do it for a moment long enough to see if the solenoid energizes and motor moves. Also make sure the compensator is in a safe area because grounding at the outside terminals bypasses the limit switches. If neither solenoid or the motor comes in, the 30 amp fuse is blown. If the motor moves in both directions, then go to the next terminal in on either side of center and do the same thing. Those terminals are the output of control switch and goes thru the limit switches. If both solenoids work then something is wrong with voltage in or the control switch. If one of the solenoids does not energize something has activated a limit switch or the switch has failed.