OK, So I put a CJ dash in my '95 YJ with a 4.0L engine. Because I wanted to use the mechanical CJ speedometer, I used a speedometer gear pinion housing assembly from a '91 YJ - which provides a connection for a speedometer cable and a 2 wire VSS connection.
The Jeep 4.0L originally had a 3 wire VSS. Using the information from several Jeep forum postings, I connected the WHT/ORG (pin 47) wire and the BLK/LT BLU (pin 4) wire to the new 2 wire connection.
The Jeep starts and runs fine, but dies almost every time I come to a stop. I assume my VSS is not sending the correct signal to the PCM for the idle speed control.
Does anyone know if I used the wrong 2 wires, or if there's a way to fix this?
You're assuming the '95 ECM uses the same pulse config as a '91. The '95 uses a gnd in, and a +8v I believe from the ECM as power, a signal out (orange). I know the +8 part is not critical as I used a simple IGN supplied +12 when I did my swap. I'd look at a '91 FSM to better understand that year VSS system in detail. Dakota Digital (.com) may be able to help too, maybe their SGI-5 unit (I think thats the speedo one, might be the SGI-8).
Awesome, I hadn't seen that sight yet! Thank you. I'll check the wiring tomorrow and see if I have them wired the same. Another forum post mentioned it didn't matter which side the ground was on, and I was a bit curious about it too. I'll post back tomorrow what I find out. Thanks again!