NP-271D Swap: VSS HELP!

jeudi 29 mai 2014

Hey guys, I am at end of my wits.



I just swapped in D80 with NP-271 from a '03 Ram 2500 Cummins.



My truck is driveable and have all gears and lock up (47RE) but no speedometer, odometer and cruise control (all in-op).



I used Dakota Digital SGI-5 C in an attempt to get my speedometer back with no success so far.



As much as I've searched, I've found no reliable source on how to get the speedometer back on 94-97 Rams. 98+ don't need this as they use the rear differential's wheel speed sensor (WSS) while the 94-97 use the VSS off the transfer case.



My truck only have RWAL, no ABS for the front. It's in-op since the day one I own the truck, no ABS lights at all, even if I have it disconnected.



I just put in a new D80 (almost all new except for ring&pinion) and got new WSS on it with new pigtail (for some reason my truck had some oddball sensor plug that do not match up to my truck's year on my old D70).



the closest one I've found is in this link, post #4 http://ift.tt/1oMST9L



I didn't followed his instruction closely but what I've done so far that didn't work:



http://ift.tt/1wqgjpW

"Application #2"



Click the image to open in full size.



FWIW, the WSS is a two wire sensor



I hooked up the "12 volt accessory power" and "GROUND" no big deal.



"Sensor ground (if needed)": I hooked it up to one of the wire going to the WSS



"Speed input signal": on the other wire to the WSS.



I even switched them both with no change just in case it matters.



"OUT" 1 thr 5: VSS's signal output circuit, white/orange (orange is the tracer). I used all five terminals with no success.



I toyed with the four "ON/OFF" switches with combinations with no success at all also, even though the "Application #2" in the PDF stated they all should be "OFF".



In end, everything I did, none worked, none will move my speedometer needle at all.



I'm thinking the wiring between where I hooked up the WSS's to (under the dash), to the WSS sensor is broken/bad somewhere in between and am anticipating to run a new wire entirely to eliminate the possibility that there's wiring problem hindering my new set up's operation. Or I may have incorrect WSS sensor that have too much gap between the tone ring to the sensor?



So, anyone who did the NP-271 swap in their 94-97 Rams, what you did that worked? I am suppose to go on a road trip, close to 10k miles total in the next two months, first part starting this Friday. so I'll REALLY LOVE TO HAVE MY CRUISE CONTROL!! :nail: I will really appreciate your help!




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