Hello everyone, I have a issue with the abs and brake light on in the dash and the Cruise Control not working when these lights came on..This happened about 2 yrs.ago and I wasn't driving it much so I just removed the dash indicator bulbs.I am now driving it daily and I really would like to get it fixed and the cruise working again.I replaced the speed sensor in the rear diff., Checked the wiring from the sensor and didn't find sny problems with it.All the brakes and master cylinder are in good shape The wiring and 4 pin connector on the solenoid pack under the master cylinder are in good shape as well.I have checked all the wiring under dash, Including brake light switch,Park brake switch, wiring and push buttons on the steering wheel for the cruise control,Blinker switch wiring to brake switch.My speedo is working fine and all the the tail light, brake light blinker's are as well...The cruise control light does not come on and I am not getting power to the cruise switches on the steering wheel..I am thinking it's the abs controller,But was told it could be the the solenoid's under the master cylinder causing it also.This is why I am asking for more help.I don't have the money to just start throwing parts on it and hoping it works, And I don't work that way myself..Any suggestions or ideas or help would be greatly appreciated.Thank y'all and have a blessed day.

 

Cruise switches get a reference voltage from the PCM, and pushing the various buttons just modifies that signal. (5 volts, I think) If you aren't seeing the 5 volts at the switch, need to find out where you are losing it.

2 or 4 wheel ABS?

 

Just rear abs.. Thanks

 

Have a service manual for your truck yet? If not, get yours here. They are on special today, for a free download.

Not much to the RWAL system......

 

Thank y'all very much for the help, I really appreciate it!!. Have a great day.

 

Chevy had a similar issue back in the 90's. It ended up being the 3 channel or 4 channel (posi traction) brake distro box. That's not the actual name of it, but its the thing that runs brake lines from it and to your 4 wheels. Has an electrical connection on it and would throw all of these error codes. Hope that helps.

 

Thank you,It one similar to that and it's located under the master cylinder.It has 2 solenoid's on it with a 4 pin connector that plugs into the bottom.I haven't had time to really look at it, But as soon as I finish up putting upper control arms and Lower ball joint's in my wife's jeep I am gonna start trying to figure it out. Thanks again..👍🏼

 

You have Rear Wheel ABS. Really isn't much to it.... Reading the codes would be a good place to start.