supercub
Modesto CA
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Joined: 04/24/2005
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Once in a while when I first start my motorhome, the ABS light comes on. If I shut it off and restart, it doesn't come on again. Any ideas? Thanks
Brian
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JaBob
Roswell, Georgia
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Joined: 06/10/2004
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Yep, mine does it too. It's one of your sensors. A trip to shop will stop it for awhile.
Bob
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brandt ranch
Tustin Ranch, CA USA
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Joined: 09/02/2003
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YC 1 might have great info, but mine only does it if the battery voltage is low from sitting long. Since you notice it when you first start up after storing, that could be your problem. After enough running time and batts read more charged, the light goes off. I'm talking 10-15 minutes running.
Brandt Ranchers, and Bailey, the Golden, too!
'05 Expedition 37U, CAT C7/Allison 3000MH
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YC 1
Yuba City Calif.
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Hi Brian,
Pulsar XP builder and pilot here.
I am copying information gathered over several months when I had the issue. My rear sensors cannot come out without removing the wheels. The front sensors do come out. I have not had an issue in a year now so hopefully have solved it.
Here it is:
I have an 08 Endeavor and it has acted up on occasion too. This is a common issue but on a recent trip mine came on and stayed on. Shutting the engine off and on did not help as in the past. Lots of folks mention cleaning the sensors but there is no way to clean the ones on my mh. The following information is copied from previous threads and I keep a copy to quote from.
"In the front run bay, there is a relay with a reset button specifically for the purposes of resetting it--somehow--check owner's manual or call Monaco tech support...I bet with all the disconnecting you did, you might have thrown the relay for a loop.
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Also try turning off batteries. You might need to drive over 5 mph to get them to reset."
My front run bay does not have a reset button. I actually looked for one yesterday and did not find one. Turning off the batteries might clear it for awhile.
Here is how I think I resolved mine. I am an ET with 40 yrs in the vehicle electronics installation business. Not abs or such but radios etc. Cop car build ups and fire trucks so some excellent experience.
Mine too was intermittent and weather sometimes seemed to be the cause but a particular bump I go over seemed to trigger it on more than one occasion. Once the light is on the cruise control does not lock on my unit.
As I was trying to figure out how to remove the sensors I discovered they have a long pigtail going to a plug. Research showed me that they should have about 1700 ohms resistance. Following the wire to the plug the first on over the rear axel showed signs of water corrosion on the pins. I cleaned all four sensors and checked their resistance. Using some WD 40 on each connector before reconnecting them should help keep the water out. I only found one that was really suspect and a second that showed only slight signs of water. Since doing this I have not had an issue. We just took a 300 mile trip and it worked perfectly. I am confident this solved my problem.
Except they came on again on a shorter trip after hitting that special bump on hwy 20.
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For a long time I was afraid to pull the front sensors out because they seemed very very tight. I finally gave one a twist and it moved. It came out without much effort after that. It was very greasy and had a large clump of grease and grime on the end of the left front one. The lump was about 1/8 inch thick. This definitely could be the issue. After cleaning them I test drove a short distance and no issues. The sensors do not go in as far as you might think. There is quite a bit still sticking out once inserted. There is a copper/brass looking insert the sensor sits in. Mine seemed to be in pretty good shape but that clump of grease on the one was significant.
H/R Endeavor 2008
2013 Ford Edge toad
Full Timers
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Jerrybo66
AZ
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Joined: 10/07/2003
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Mine did that too. It was the sensor for the brake fluid reservoir. The fluid was a bit low.....Cheap fix..
Support the Country you live in or live in the Country you support
2003 Sierra SP 26'Toy Hauler
1997 F-350, PSD, 4X4, red Crew Cab, long bed.
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powderman426
ohio
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That will happen when your wallet is to heavy. A trip to the shop will fix that.
Ron & Charlotte
WD8CBT since 1976
28' Prowler & 05 Ram QC LB
I started with nothing and I still have most of it left
I never fail, I just succeed in finding out what doesn't work
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brandt ranch
Tustin Ranch, CA USA
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Jerrybo66 wrote:Mine did that too. It was the sensor for the brake fluid reservoir. The fluid was a bit low.....Cheap fix..
That too. But then I would worry why it was losing fluid.
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RV-1/2n-FUN
FL.
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Joined: 03/30/2003
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got there second with answer 
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brandt ranch
Tustin Ranch, CA USA
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I would hope owners of rigs with average weights of 10,000 to 45,000 pounds would be aware enough of their rig's fluid statuses to know if a sudden loss of fluid is different from an eventual, and progressive (read: observable) loss of resorvoir level as to said fluid.
Then again, the DS's I often see on the road aren't even qualified to have a bus pass.
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C-Leigh Racing
Nashville NC
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As the brake pads wear, the caliper pistons go out farther & use up more fluid from the master cylinder.
Those are some pretty big piston in those calipers at all four corner.
Neil
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