I am not trying to challenge anyone just trying to learn - but my parts list shows a different part number beginning in 1990. Also my 92 service manual
says not to use the set up procedure for pre 1990 trucks. I do not know why or what the difference is. I have obtained a 1989 LSV and I am hoping to install it in a 1992
truck, so I guess I need to find the procedure for a 1989 MJ.