ABS light not coming on with ignition.

i have an 07 columbia, and the abs lights don't come on when running the self diagnostics when i switch on the ignition. fuses and bulbs are good. i can hear the valves clicking when i switch on the ignition. any ideas?

 

i have an 07 columbia, and the abs lights don't come on when running the self diagnostics when i switch on the ignition. fuses and bulbs are good. i can hear the valves clicking when i switch on the ignition. any ideas?

 

http://standards.sae.org/j2497_200706/

read this.

If your trailer ABS wont supporting PLC, additiona cabel ore bulleye is used

 

Replace cluster unit (shows odometer and warning lights) i had to do that to 2 Columbias