1987 4+3 overdrive problem
Thread Starter
Instructor
Joined: Dec 2020
Posts: 153
Likes: 76
From: Midland MI
1987 4+3 overdrive problem
hello all, I am trying to isolate an issue I'm having with overdrive in my 87 4+3, I would like to bypass the ECM to rule out(or in) a control issue, there is conflicting info on the web concerning the wires that need to be spliced together going to the ECM to make OD manual control, does anyone know which wires these are on an 87, color or pin #?
