Bad ABS Module?

[Henry]

I have a 2003 300a I've been chasing as abs light on. The code is for the right rear speed sensor circuit fault. After a lot of searching and investigating with a multimeter and have discovered that the abs module is not putting out the necessary 5 volts to the sensor to the right rear sensor (checked at the abs module plug). Has anybody else experienced something similar? I have a complete abs unit off another 300a on the shelf, just making sure that there isn't some other possible solution before i take the time to switch the pump out and bleed the brakes with the scan tool.

[stevengerard]

Can you just change the electronic control by itself instead of disconnecting the whole module? I have an 04 with TC and have the same issue. Mine has not been working for a few years now. So long that the TC and ABS light doesn't even go on anymore. Once in a while they will both illuminate but usually stay off. I too plan on swaping out the module but I may try to just change the electronics, not sure if that can easily be done though.

[Zack]

Did you verify the ABS module is getting proper voltage?

[Henry]

I have not checked voltage to the module yet as i do not have the wiring diagram and had to stop last night before i got that far. I will check that when i get home. I was also wondering if anybody has ever switched just the electronics. I believe i have a low mileage abs unit off a marquis I might sacrifice in order to figure out if its possible.

[Zack]

I have not checked voltage to the module yet as i do not have the wiring diagram and had to stop last night before i got that far. I will check that when i get home. I was also wondering if anybody has ever switched just the electronics. I believe i have a low mileage abs unit off a marquis I might sacrifice in order to figure out if its possible.

They are different. The marauder abs unit is programmed for staggered sized tires

[Henry]

I checked voltage at the module key on, engine off. 11.6 volts. Battery is at 11.62. Guess I'm off to my storage building to grab a few modules and see what I can figure out.

[old timer]

You can swap only the electrical portion of the abs module without a problem. No brake bleeding required. You will run into an issue if you use a grand marquis module on your marauder unless you have the same size tire all the way around.

Sent from my SM-N910V using Tapatalk

[Henry]

I plugged in an extra module I had off a 300a. I now have power to the sensor. I'm gonna swap the electronics when I get a chance and it should be good to go.

[Spectragod]

Module master can rebuild your old unit fairly reasonable. And yes, the electronics can be changed out easily, you will possibly run into issues with the tire stagger.

[Henry]

I have my spare marauder one ready to put on. I will be sending the damaged module out to be repaired and it can sit on the shelf in case I ever need it.

[stevengerard]

WHo did you find to repair it. The places I contacted said no to the Marauder module.

[Mightypeter]

I'm looking for a place that will repair my ABS unit -- same issues as others are having in this thread. Do you know who does this work?

Peter

[Henry]

I'm going to see if myairbags.com can repair it. They have abs module repair listed on their website for 100-150 depending on the type. I've used them for resetting air bag sensors several times. Very good customer service and quick turn around.