Dumping this here for future reference:

I was thinking about how you would wire this into the Fiero so you don't have to get a control module from that seller on eBay, while it's cool that it can be controlled with the knob, or the automatic module, or the GPS version, I think it would be best if it operated off the car's VSS signal so it's altering the power assist according to the car's speed in a self contained system.

The Fiero can put out a 4000 PPM signal from the 88 speedometer on pin M(?) from my research or you can use the third gen FBody buffer box like the Firebird cluster swaps, and after some exhaustive research it appears that the Vue also uses a 4000 PPM signal. Here are the references and you should be able to hook in the signal wire to pin 4 on the Vue's connector to get the proper speed signal.









Also connect the wire from Pin 2 on the OBD2 port to Pin 5 on the EPS unit if you have an engine swap it looks like, same circuit.

[This message has been edited by rbell2915 (edited 07-16-2025).]