Dodge Cummins Diesel Forum - View Single Post - 1989 RWAL Code Scanning
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post #5 of (permalink) Old 03-12-2019, 12:33 PM Thread Starter
1989sligo
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Well there is a wheel speed sensor on the top of the differential housing that uses a magnet on the ring gear or something near that to pickup wheel speed. Its not out of the transmission. There is a way to pull codes though. I understand its way before OBD-II but there is a factory scan tool called a DRB-II scanner that has the connector for it but it is a big money tool. There are things online and on youtube showing the codes and stuff but they either do not explain it well or show in the video how they have connected to the module to get the light to flash. But what I can tell you is that they aren't using any scan tool and they are grouding and powering certain pins on the module but I am not sure which...
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