Chillin on the Gulf Coast
I have just finished the majority of a OBDII swap and a full engine rebuild. I had the bronco where it would run and drive (trans would not shift and no speedometer at all, turned out to be an overlooked ground). But I had a check engine light (I expected one) and went to download it and the tester would not connect. The tester had voltage at the OBDII port but would not connect to the computer. I thought there might be an overlooked plug in the dash, but when I removed it and researched I found out that the only plugs not installed are for the doors and the rear air bag sensor. Everything else in the truck is hooked up. Any thoughts? Does anyone have the schematic for the OBDII port to the ECCV computer that I can test the wiring?