k well im 100 sure that you cannot use thatWHOLE 91 harness because you have a 94 and the harness is diffrent on the 91's. Now what im not sure is maybe you can use the engine side of the harness to connect all the things for the tranny which is the reason i said you cannot use the WHOLE harness.. I think the computer side is the only thing that may be diffrent in the 91 harness....