ABS Warning Light

rgatijnet1 wrote:

str8shooter_mn wrote:
Finally got a chance to check the brake sensors. All 4 of them were dirty and grimy. Cleaned all 4 with steel wool then emery cloth. Left out (not inserted) and checked them with a VOM. All 4 measured out at 1.2 k ohms.
Still have the ABS light on after running for a minute. Didn't have an air compressor to blow out gunk, but did use some canned air.

Anyone have any other suggestions??
Thank You

It could be low fluid in either master cylinder chamber that provides fluid to the front and rear brakes.
Unplug and check the electrical connections to the master cylinder and to the ABS controller which is where all of your brake hydraulic lines merge.
Need to clarify one statement.........Did you just run the engine for one minute or did you drive the coach? You have to drive it for the ABS system to reset itself.

I did not drive the coach. Will do so in the next couple of days.
Also, brake fluid is up to the proper level. Will also check the other connections. Thanks for the hints.

Our 2008 Winnebago had and intermittent ABS light. That was the warning for the hydraulic brake system going belly up. $6,000.00 part to repair. When it went bad we were only using the front brakes to stop. I'd have a mechanic look at it.

str8shooter_mn wrote:
Finally got a chance to check the brake sensors. All 4 of them were dirty and grimy. Cleaned all 4 with steel wool then emery cloth. Left out (not inserted) and checked them with a VOM. All 4 measured out at 1.2 k ohms.
Still have the ABS light on after running for a minute. Didn't have an air compressor to blow out gunk, but did use some canned air.

Anyone have any other suggestions??
Thank You

It could be low fluid in either master cylinder chamber that provides fluid to the front and rear brakes.
Unplug and check the electrical connections to the master cylinder and to the ABS controller which is where all of your brake hydraulic lines merge.
Need to clarify one statement.........Did you just run the engine for one minute or did you drive the coach? You have to drive it for the ABS system to reset itself.

Finally got a chance to check the brake sensors. All 4 of them were dirty and grimy. Cleaned all 4 with steel wool then emery cloth. Left out (not inserted) and checked them with a VOM. All 4 measured out at 1.2 k ohms.
Still have the ABS light on after running for a minute. Didn't have an air compressor to blow out gunk, but did use some canned air.

Anyone have any other suggestions??
Thank You

rgatijnet1 wrote:
The sensors just pull right out. Might be a little tight but they will slide right out. The electrical connection is about 2' from the sensor. Use your meter and you can read the resistance on your sensors. The one that reads different is bad. A good sensor will read about 1000 ohms.
If they all read OK then just clean them and reinsert them on each wheel. Be sure to push them all of the way in until they will not go any further.

Use compressed air to blow the brake dust and road grime out of the hole the sensor will be installed in.

The sensors just pull right out. Might be a little tight but they will slide right out. The electrical connection is about 2' from the sensor. Use your meter and you can read the resistance on your sensors. The one that reads different is bad. A good sensor will read about 1000 ohms.
If they all read OK then just clean them and reinsert them on each wheel. Be sure to push them all of the way in until they will not go any further.

You still have brakes so that's not a problem. Happened to me and it was a sensor. Still cost me $150.00 to resolve.


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Kind of what I was thinking. First time this has happened to me. Thanks for the input folks>

You still have brakes so that's not a problem. Happened to me and it was a sensor. Still cost me $150.00 to resolve.

I cleaned the sensors on the front wheels on a 14 year old motor home that cleared the ABS light. The motor home only had 15,000 miles on it. I used compressed air and some emery cloth.

Just reread your post. Most likely just a bad ABS sensor.