Thank you sir! Was a bit hesitant to send 12v despite looking at my alldata wiring diagram and not seeing any reason to not try this. Glad to know it will work as expected as a diagnosis method.
Thanks for sharing. I didn't have to pull off the connector harness or even take apart the unit. The error message reads the "Pump Motor Circuit - Stuck" so I just got a rachet extension and tapped it all around the motor and it started working and the ABS lights and error messages were gone. My vehicle is a Silverado 2017 HD 2500 Duramax 6.6 V8. I hope someone finds this useful.
Step 1 would be to connect a scan tool with bi-directional controls. Step 2, would be to activate the pump motor (see the last minute or two of the video.), and see if the module is sending power to the motor. Can you hear the motor?
Thanks, super helpful video. Is the module supposed to give 12v? The one I’m working on is supplying the module with 12v from the harness, but the module is only supplying 5v to the motor connector.
With the module removed from the pump, but still plugged into the harness connector, I checked at the two terminals in the module that power and ground the pump.
I'm not sure. I don't have a schematic of the module, but on my scan tool, I was showing around 12 volts. There's no telling what will happen with the motor removed from the circuit...no load. With my powerprobe, the motor ran with 12 volts. You may have a bad module.
Thank you for this video. It is the most helpful I have found. I have a question if you don't mind. I used a scan tool to run that abs motor and it comes on but it says the voltage the motor is pulling is anywhere from .4v to 4.6v and not the full 12v as shown in your example. The motor itself sounds fine though. Thoughts? Could the motor be bad?
Check you ground connections with a multimeter set to dc. Red lead to the ground wire on the connector to the ABS module & black wire to chassis ground. If more than 300mv, repair ground.
@@superk4562 that would be awesome. I found a place that will rebuild the little motors. I tapped on it with a screwdriver and it started working normally so it seems that the brushes got stuck. As far as I can find the entire assembly has to be replaced for $800 which seems excessive when the only issue is the motor
@@sargetester99 Onwer purchased van at GSA (Government Services Administration) auction; ABS light was on. I cleared the DTCs and pulled up wheel speed sensors on a test drive; all sensors were working properly, so I had the owner perform a panic stop to check ABS operation; that set the DTC for the pump motor open circuit.
Thank you sir! Was a bit hesitant to send 12v despite looking at my alldata wiring diagram and not seeing any reason to not try this. Glad to know it will work as expected as a diagnosis method.
Thanks for the great info!
Very welcome!
Thanks for sharing. I didn't have to pull off the connector harness or even take apart the unit. The error message reads the "Pump Motor Circuit - Stuck" so I just got a rachet extension and tapped it all around the motor and it started working and the ABS lights and error messages were gone. My vehicle is a Silverado 2017 HD 2500 Duramax 6.6 V8. I hope someone finds this useful.
This just worked for me. At least now I know it's the motor 🍻
This video is so helpful. What is step 1 and 2 for the diagnostic procedure?
Step 1 would be to connect a scan tool with bi-directional controls.
Step 2, would be to activate the pump motor (see the last minute or two of the video.), and see if the module is sending power to the motor. Can you hear the motor?
Huge thumbs up.
dude i love you, thank you
Glad I could help
Thanks, super helpful video. Is the module supposed to give 12v? The one I’m working on is supplying the module with 12v from the harness, but the module is only supplying 5v to the motor connector.
How are you measuring motor voltage? The motor terminals plug directly into the module.
With the module removed from the pump, but still plugged into the harness connector, I checked at the two terminals in the module that power and ground the pump.
I'm not sure. I don't have a schematic of the module, but on my scan tool, I was showing around 12 volts. There's no telling what will happen with the motor removed from the circuit...no load. With my powerprobe, the motor ran with 12 volts. You may have a bad module.
Thank you for this video. It is the most helpful I have found. I have a question if you don't mind. I used a scan tool to run that abs motor and it comes on but it says the voltage the motor is pulling is anywhere from .4v to 4.6v and not the full 12v as shown in your example. The motor itself sounds fine though. Thoughts? Could the motor be bad?
Check you ground connections with a multimeter set to dc. Red lead to the ground wire on the connector to the ABS module & black wire to chassis ground. If more than 300mv, repair ground.
@@superk4562 do you know if that motor on the valve body can be removed without. Opening the hydraulic system?
@@Mr-Payne not sure, but I have two units on my work bench that I can try.
@@superk4562 that would be awesome. I found a place that will rebuild the little motors. I tapped on it with a screwdriver and it started working normally so it seems that the brushes got stuck. As far as I can find the entire assembly has to be replaced for $800 which seems excessive when the only issue is the motor
@@Mr-Payne the unit for my BMW is $2400.00
My Mentor Super K
👍
QUICK-WITTED Super K
From Nick Ayivor from London England UK 🇬🇧 ⏰️ 20:28pm
What symptoms did the owner complain about?
ABS light was on.
@@superk4562 but no complaints on how it operates? So operation seems to be fine with the owner?
@@sargetester99 Onwer purchased van at GSA (Government Services Administration) auction; ABS light was on. I cleared the DTCs and pulled up wheel speed sensors on a test drive; all sensors were working properly, so I had the owner perform a panic stop to check ABS operation; that set the DTC for the pump motor open circuit.