1989 Ram 50 G54B, No Overdrive!

Needing help figuring out how to get my truck back into O/D. I’ve had this issue for a minute now and just recently did away with the Mikuni carb for the weber as everyone else has suggested. I can’t get past 3rd gear and my O/D button isn’t working (i don’t hear a relay click when key is turned and pressing button). Either my relay is bad or something else, I heard you can ground a wire out to be able to have O/D 24/7 regardless of other factors such as engine temp. If anyone could give me a clear picture of where said wire is, because I only have the plug to the old carb now. Any information is greatly appreciated!

Send Pennyman a PM. he knows everything about the automatics. Not sure the last time he was on here