RABS light comes on but will not flash a diagnostic code

[StewieNC]

Problem below is on a 1999 Ranger 2wd, 4L V6 manual transmission with RABS. When I turn the key, everything seems normal. The ABS and brake dash lights come on the and then go out. As soon as I drive away maybe a hundred yards the ABS light comes on and stays on. I have the factory manual and I found the diagnostic connector. I turn the key and then ground the orange/black side of the connector. I get nothing, no flashes at all. The only thing I have replaced is the speed sensor and that had no effect. I am wondering if the control module is bad since I cannot get a flash code. I have tried multiple times but no flash code. I thought I would post here in case someone has seen this before. Truck is in otherwise great shape only 100k miles.

 

[dvdswan]

Welcome to the site. Is there anything in the manual about not reading codes?

 

[StewieNC]

The diagnostics are based on the number of times the ABS light blinks when you do the test. There is a table that corelates the number of flashes to probable causes. If it flashes 16 times it indicates that the system is working. I have not seen anything in the manual that corelates to not flashing at all.