ABS/ Brake Light comes on and stays on

[John Berger]

While driving home from a camping trip yesterday, my ABS/Parking Brake indicators came on and stayed on. About every 5 minutes after that they would cycle off and come right back on. Now they are on and haven't cycled off, then on again. I definitely lost my anti-lock brakes. Took it out for a skid test after unhooking the trailer. Yepp, they're gone. Anybody know what's up.

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1999 Dodge Ram 3500 Quad Cab 2wd; 5 spd; 4:10 LSD rear; Mag-Hytec differential cover; US Gear EGT and Boost gauges. Stewart Warner Fuel Pressure Gauge with dual senders, Westach Oil Temp Gauge for differential. Rancho 9000's shocks, PowerEdge EZ Box, Amsoil foam air filter and synthetics in the motor and differential. Cummins Power, don't leave home without it

[This message has been edited by John Berger (edited 05-21-2001). ]

 

[WyoJim]

John,
Mine did that and it was a wheel speed senser

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98. 5 24 valve auto, QC, LB, EZ, DTT vb 9 1/2ft 3500# slide in S&S Camper

 

[John Berger]

I read on some past threads that there are three wheel sensors. Where are they located? Looks like I'll have to dig out the service manual tonight.

 

[WyoJim]

Sorry, John, I don't even know what one looks like. Montana Dodge in Billings MT warrantied mine, no questions asked.

 

[B.G. Smith]

There is a sensor on each front wheel and one on the ring gear of the differential. The one at the diff. reads the some gear that the speedometer looks at. Mine quit last fall and it turned out that the sensor at the diff. was covered with metal particles, (carrier bearing failure) pull the level plug from the diff. and see if it has collected any metal. The sensors at the front wheel look at a sprocket type ring behind the brake disc. bg

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White 99 3500, QC, 3:55, auto. most options except leather, Line-X bed liner, fiberglass running boards Rancho 9000s, bug shield and window vents, black vented 5th wheel tailgate, 110 gal. aux. fuel tank.

 

[John Berger]

Now I'm getting a little worried. I saw metal flakes in the pan that the mechanic used to catch my fluid while replacing the rear pinion seal last week. However, I have not seen metal flakes on the Mag-Hytec dipstick and the gear lube analysis came back good which alleviated any concern that I had. I wonder if the wheel sensor would be included in my drive train warranty. Wouldn't that be sweet #ad
Right in the middle of this warranty issue, another problem in the differential pops up. Hopefully it will just be the sensor. Oh well, never a dull moment.

 

[Texas Diesel]

John, please keep us posted.

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2001. 5 SLT QC SB 4X4, 6 speed, HO, LSD, 241HD, 3. 54, camper special, power everything, trip thingy, REAL bumpers, green/silver, Nerf Bars, Vent Visors, trailer tow pkg

 

[John Berger]

I checked the wheel sensor last night. I measured the resistance across the sensor itself and didn't get anything on the meter, but I'm not sure if I'm doing that right. The sensor was in pretty good shape, no metal or anything like that. Does anyone know if I'll need the scan tool to get the dash indicator lights to shut off? The new sensor goes in tonight, so I guess I will know soon enough.

[This message has been edited by John Berger (edited 05-22-2001). ]

 

[John Berger]

The sensor is in and that thump that I thought were my grid heaters is actually coming from the brake master cylinder area. Is it the HCU? That would explain why it was gone when I lost my ABS. Oh well, just goes to show that the assume factor is still valid. #ad
Time for injectors. #ad