ABS Light please help!

[SwiftThunder]

I have a 93 ranger splash and the abs light is on all the time and I cannot figure out how to fix it so the light will turn off . I know that when the light is on there is a malfunction somewhere but the only thing I know about are the sensors behind the rotors. And even that gets me nowhere. The ranger is new to me so I hope you can please help.

[manlystanley]

Originally Posted by SwiftThunder

I have a 93 ranger splash and the abs light is on all the time and I cannot figure out how to fix it so the light will turn off . I know that when the light is on there is a malfunction somewhere but the only thing I know about are the sensors behind the rotors. And even that gets me nowhere. The ranger is new to me so I hope you can please help.

There is also a sensor on top of your differential that affects the ABS. However, if your speedometer works, then I'd think it's OK? Did you check for blown fuses? Another possibility (although much more expensive) is your ABS modulator or ABS computer.

Best Regards,
Stan

[SwiftThunder]

isnt the speed sensor in the transmission? and ill check the differential.

[manlystanley]

Originally Posted by SwiftThunder

isnt the speed sensor in the transmission? and ill check the differential.

For a 93, you might be right. On my 2000, its in the differential.

Best Regards,
Stan

[DonSor]

The ABS system also has something to do with the speedometer input. From my experience when mine went out ('99 Ranger 4.0L) my speedometer was reading erratically at lower speeds. After I replaced the sensor atop the differential, my speedometer worked OK. I believe that the speed signal as well as the signal from the ABS sensor are inter related.

[SwiftThunder]

Ok well if this helps any, I went under my truck today and I looked at the differential and I checked the wires and they were ok I also checked the voltage and it was 5v dc I dont know if that gets me anywhere specifically but I know theres voltage. But that doesn't mean the rear diff sensor is working. So from there I looked for other sensors and there are not any on the brakes anyhwere. I have a 2.3L with a 5speed so it had to be pretty simple to find things. Someone please help me.

[DonSor]

A voltage reading is a good sign however the sensor may still be bad.

[SwiftThunder]

Ok so being that i have voltage on the rear dif are there any more sensors anywhere else? So that i may do more testing.

[DonSor]

Unless my manual is wrong you only have one ABS sensor. I only have one in my 99 Ranger and in my previous 94 Ranger. Other type vehicles especially those with front wheel drive have four sensors, one for each wheel.

[SwiftThunder]

Ok since there is only one sensor I will remove it and test it and maybe replace it. Do you know where I can find the brain of the ABS or even the fuse so I can check that.

[DonSor]

I don't believe that there is any fuse in the circuit. The sensor is an input device so there is no brain. It's easy to remove. Have Autozone check it out. Remember that there are two inputs to the ABS system. The other is the input from your speedometer.They both have to work right for the ABS to properly function.

[SwiftThunder]

So I am assuming that the abs sensor in the speedometer is what calculates the speed for the abs but incase it is that sensor that is bad where do i find it?

[DonSor]

Sorry for the confusion. The speedometer does not have an ABS sensor. As opposed to previous models, speedometer no longer use cable. The system use electronic inputs to the gauge as well as the ABS. Before you replace the speedometer sensor, have the ABS at the differential checked out first. In addition to the ABS warning light, another symptom will be that your speedometer works erratically at lower speeds.

[SwiftThunder]

Ok so i am going to remove the rear end sensor and check it, do you have any reccomendations on how to remove it from the differential?? Any steps or tools that may help?

[DonSor]

As I recall, disconnect the harness from the sensor and I believe the sensor has a clamp with a single bolt. It would be best to have the rear end of the vehicle on stands so you have plenty of room to maneuver. It's a simple operation unless you ran into corrosion or the bolt frozen.