'02 7.3L ABS Light??

[Muddin]

For some reason my ABS light randomly comes on and then goes off. Sometimes its for a couple minutes, sometimes its every time I start the truck for an entire day or two.

I have checked my brake fluid level etc. Everything is fine. The first time it did this was after I washed the engine compartment w/ simple green. before that, it never came on. I think I must have gotten moisture in a connector somewhere but I'm not sure. That was over 2 months ago and it came on again today...

Scanned the codes with the light on and nothing comes up...

Ideas?

Truck: (02' F350, DRW, 4x4, 6spd 7.3L)

[Bad Night]

It sounds like a front sensor going bad . If it is the rear sensor the speedo freaks out too . Possibly just a coincidence that it came on after washing the engine , or maybe it got really wet . If not that possibly the connector on the abs module . Take it apart and clean it and de-ox it .

[fifty]

Check your battery voltage. Mine did that, then the radio went dead followed by the Gauges. Culprit was the alternator...followed by ruining both batteries...

[Muddin]

Ok, thanks. My Speedo has been fine so I dont think its the rear ABS sensor. I will check the other stuff...

[coot1]

My rear sensor went bad and the speedo still worked. Apparently the speedo gets an input from the transmission. At least on a 2wd anyway. Mine would stay off when I first started it and the come on as soon as I started to move. Got new sensor from autozone for about 30 bucks.

[keltec9mm]

My 2000 did this, I replaced the rear speed sensor shortly after purchasing the truck, this fixed the speedometer being flakey as it worked sometimes, and than wouldn't others and the ABS light would come on when I started moving the truck. Than my abs light started coming on and off it ended up being the front DS, sensor on the wheel hub assembly was bad. But the whole wheel hub went bad shortly after the light coming on so when I replaced it, it fixed that abs light!

[Bad Night]

Originally Posted by keltec9mm

My 2000 did this, I replaced the rear speed sensor shortly after purchasing the truck, this fixed the speedometer being flakey as it worked sometimes, and than wouldn't others and the ABS light would come on when I started moving the truck. Than my abs light started coming on and off it ended up being the front DS, sensor on the wheel hub assembly was bad. But the whole wheel hub went bad shortly after the light coming on so when I replaced it, it fixed that abs light!

Good point , if the bearing assembly in the front is bad it could cause this . Jack it up remove the tire and check it out . It would have to be pretty bad though . Just had the same thing happen with my beater mountaineer and it was a bad front bearing assembly .

[keltec9mm]

Originally Posted by Bad Night

Good point , if the bearing assembly in the front is bad it could cause this . Jack it up remove the tire and check it out . It would have to be pretty bad though . Just had the same thing happen with my beater mountaineer and it was a bad front bearing assembly .

My hub didn't look bad and it didn't have any play in it. But at highway speeds, it started to squeal like a teenage girl. Somehow the bearings got moisture and started to sieze up. The only thing that pointed to the wheel hub assembly was the fact the ABS light was on, and the hub was hotter than the other side. It wasn't super hot, but was hotter. When I had the front end of the truck off the ground, both tires spun smoothly as well. It was actually wierd, that it only showed a problem at highway speeds!

[Muddin]

Well, I replaced the hub bearing assembly on the passinger side and found metal shavings in it! Obviously it was toast! Problem fixed!

Truck runs smooth on the Hwy again!

[Bad Night]

Cool Glad to hear you got it .