No Speedometer, Cruise, TC Lockup

[alaskax]

Well, I'm lying a little bit... My ATS Diesel Performance Torque Converter lockup controller is not getting the speed signal it needs to activate TC lockup. The standard transmission lock is working. And the other two things add to the case that I am missing a speed signal. All happened together with no warning. Drove my old truck to Alaska from Wisconsin, and this is just another of a series of problems (transmission failure and IP failure). Looking on the forum(s), I've been confused whether the transmission speed sensor or the differential sensor might be the culprit, and at first I thought it was the transmission speed sensor, so I replaced it, no change. Both old and new had 0.37 Ohms resistance, line connecting it has 2.1 k Ohms. At least that should indicate neither wire is broken. Further research here seems to point to the differential sensor being the "real" speedometer signal, while transmission sensor is primarily for shifting/shaft speed info. So, pulled the wire on the differential sensor, read 8 MEG Ohms on this sensor, and 0.27 M Ohms across the 2 wire input line. Both of these values seem like a LOT of resistance, anyone have an idea about that? Maybe that's normal? I noticed one of the connector prongs was corroded, so I scraped and flushed with brake cleaner, connected back up, nothing.
Codes P0500 and 1693 set, identified from doing the key on/off test, and instrument cluster test (odo button pushed, turn key on) showed all gauges working through whole range.
Do I need to do more tests on the differential sensor, or ???
Not sure if my sig is here, but 2000 Cummins 2500 4x4 quadcab, various powermods, and black box to correct speed for my 37" tires.

 

[NIsaacs]

I would pull the sensor and make sure there is no metal on the contact. A small piece of the carrier bearing shim may have spit out and is stuck on the sensor.

https://www.napaonline.com/en/searc...sor&scene=partTypesScene1&fullyQualified=true

 

[GAmes]

The resistance of the ABS sensor in a '96 should be 1750 ohms + or - 750 ohms. More than likely yours should be the same. Getting a factory service manual would be something to think about.

 

[DavidC]

The resistance of the ABS sensor in a '96 should be 1750 ohms + or - 750 ohms. More than likely yours should be the same. Getting a factory service manual would be something to think about.

Going off of memory but as Gary stated the rear pumpkin sensor should ohm about 1800. I am betting that is where your problem is.

 

[alaskax]

Thanks, definitely has much higher resistance, I'm going to pull it and see what it looks like, ordered a new one for good measure.