PSOM for '96 pickups. '92-95 similar.
http://www.revbase.com/BBBMotor/Wd
CHECK SPEED INPUT SIGNAL
NOTE: Only wiring harness end of connector is to be probed.
* Connect Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent to Pin 4 (speed in ) and Pin 5 (speed in -).
* Does the voltage increase smoothly and continuously from 0 to approximately 3.5 volts as vehicle speed increases from 0 to 48 km/h (0 to 30 mph)?
OR:
* If available, a frequency counter may be connected to Pin 4 (Speed in ) and Pin 5 (Speed in -).
* Does the displayed frequency of the signal increase smoothly and continuously from 0 to approximately 667 Hz at approximately 48 km/h (30 mph)?
OR:
* If neither a voltmeter nor frequency counter is available, vehicle speed control may be used as a good indicator. If it works normally, then the speedometer module is at least receiving a speed input signal and the wiring and
ABS sensor (DY1123, F85Z-9E731-AB) can be assumed to be good.
Rear axle sensor should read 800-1400 Ohms across the pins, and more than 10 Ohms from the metal shell to either pin
![psom-fseries.jpg PSOM for '96 pickups. '92-95 similar.
http://www.revbase.com/BBBMotor/Wd
[url=https://www.supermotors.net/registry/media/494370][img]https://www.supermotors.net/getfile/494370/thumbnail/cruisevacuum92circuit.jpg[/img][/url]
CHECK SPEED INPUT SIGNAL
NOTE: Only wiring harness end of connector is to be probed.
* Connect Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent to Pin 4 (speed in ) and Pin 5 (speed in -).
* Does the voltage increase smoothly and continuously from 0 to approximately 3.5 volts as vehicle speed increases from 0 to 48 km/h (0 to 30 mph)?
OR:
* If available, a frequency counter may be connected to Pin 4 (Speed in ) and Pin 5 (Speed in -).
* Does the displayed frequency of the signal increase smoothly and continuously from 0 to approximately 667 Hz at approximately 48 km/h (30 mph)?
OR:
* If neither a voltmeter nor frequency counter is available, vehicle speed control may be used as a good indicator. If it works normally, then the speedometer module is at least receiving a speed input signal and the wiring and [url=https://www.amazon.com/dp/B001H1MQFI]ABS sensor (DY1123, F85Z-9E731-AB)[/url] can be assumed to be good.
Rear axle sensor should read 800-1400 Ohms across the pins, and more than 10 Ohms from the metal shell to either pin
[url=https://www.supermotors.net/registry/media/280872][img]https://www.supermotors.net/getfile/280872/thumbnail/rabs-components-92.jpg[/img][/url]](https://www.supermotors.net/getfile/95932/fullsize/psom-fseries.jpg)