1997 Ranger STX 4.0L 4x4 speedometer won't work, all other gauges work. Replaced sensor on the back of the tcase and the male Plug end as well to ensure they were both good. Fuses are all good as well, it was working fine for a little while then it would go in and out. Any help would be appreciated, I'm stumped and frustrated

 

there is an abs/ speed sensor on top of the rear differential i think its a two pin try that one.

 

I thought that was just for 2wd models On the rear diff and wouldn't the ABS light be on? Sorry for askin ?s ha but I just don't wanna buy any more parts unless I can pinpoint it definitely

 

The ABS sensor on the diff does double duty as a VSS for speedometer input in 98~00 Ranger and 01 2.5L Ranger. Other years use this sensor for ABS only.

The 95~97 speedometer gets its signal directly from a gear driven Signal Generator. The 2WD SG is driven from the transmission; the 4x4 SG is near the top of the transfer case.

The SG uses two wires. The gray/black goes to the speedometer, PCM and speed control in parallel. The pink/orange goes to the bolted ground under the hood on the DS inner fender apron.

Possible causes for dead speedometer:

Open/grounded gr/bk wire
Open pk/or from SG to DS inner fender apron ground point
Bad speedo head/cluster
Bad Signal Generator
Stripped drive gear for SG