456M GTA drivers side fore/aft switch....

I have a "new to me" 456M GTA. The fore/aft control on drivers seat moves about 2 inches. I cannot find any obstructions as I and another friend both have looked. Any suggestions?

 

Welcome to the forum, Laurens!

I don't have a 456M to play with, but I have the workshop manual (which may or may not help) ...

Does the seat move any further using the "easy access" switch "A"?

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Pressing "A" and moving the seatback forward should move the seat fully forward. Returning the seatback to the upright position should make the seat return to the "preset position".

I have some wiring diagrams if you need them, but it's not clear from the diagrams what components do what. Note that there is a potentiometer in the seat which the seat ECU uses to remember seat positions, but I don't know if it affects normal operation with the fore/aft controls (B1). As the fore-aft motor does run (briefly) and the switches do seem to be working, it does seem like there is an obstruction of some sort or a more complicated control issue.

Do the seat memory switches work?

Experts?

 

My 456M driver seat automation gave up the ghost and caused an electrical concern (battery draw down) and a subsequent “alarm” concern. Initially the dealership just replaced the fuse. In any event, a pinched wire (or short) was resolved and the problem was corrected. However my seat memory function does not work. I come to understand the seats are problematic and wish you luck. Welcome to the forum it has been a great resource.

 

If the normal seat fore-aft control does rely on the position potentiometer, and the potentiometer is faulty, there is a gentleman on eBay who can provide you with a 3D printed replacement for the component which most often fails in the potentiometer.

 

These things are truly a labor of love.