I have a 99 F150 4X4 with 4 wheel ABS and 80K miles. My ABS light on the dash has been coming on recently. It will go out for a while, & then come on again later.What is the first step to figure this out? Does this sound like anything someone may know who has worked on theirs before?
Help me out here, I am a points/carburetor guy trying to figure out these modern machines.
As long as the light on the dash has been on there will be a trouble code stored in the ABS module. The first step is to get the truck scanned and see what code comes up. If you post the code we can probably give you some tests to do.
I had the same problem on my F150, but it turned out to be that when I started the truck I rotated the key a little too much and the ignition on the steering column got jammed too far up (weird). Now every time I start my truck I make sure my ignition is in the right place.
This solved my problem with the ABS light staying on all the time.
Hope this helps man.
I am now noticing (every once in a while) the brake pedal pulsating like the ABS is actuating. This will occur at random during light braking.
I must ask a possible stupid question about this scanning:
If I were to purchase one of these code scanners, will it tell me codes for the brakes or ONLY engine/emmisions related problems?
I really hesitate to take the truck to the dealer just yet.
Not all codes make the check engine light come on. They will still be set in memory. An ABS problem isn't an engine problem, thus no light. So, go down there and have them scan both KOEO and KOER codes. You might strike gold.
Well I went to the Ford dealer and bought a new ABS sensor that goes into the rearend. This part costs less than 20 bucks and seems to be one of the more failure prone components in the system. I havent got any codes scanned yet, just some searching on this great forum and others mentioning of this part failing.
If I get a chance, I will install this tonight and see if I get lucky!
Should you remove the battery's negative cable while removing the sensor, so the system will reset with the new sensor?
I hope that made sense. I'm trying to get updated myself. I've had the same issue with the light on every now and then. Maybe I should replace my ABS sensor, too. I haven't experienced any malfunctions, just have the light on every now and then.
I was thinking the very same thing about disconnecting the battery, but I didnt do it while replacing my sensor tonight. I wanted to see what it would do. So anyway, I replaced that rear sensor and went for a ride. The ABS light came on but the pedal never pulsated no matter how many times I pressed the brakes.
I do not know if I fixed it, so I will drive it for a couple days and see if the pedal acts up. The rear ABS sensor that came out did have small metal fragments stuck to it.
thanks for the tip, my truck has already been doing the brake pedal pulsating chattering thing off and on at low speed.
Odd thing is, now, a day after installing the new rear sensor, the ABS light is out....but wife claims the pedal still made the chattering/pulsating at low speed once. I drove it home after this and everything worked like a charm, so who knows what is going on.
I am going to take the truck tomorrow to a shop to scan for codes on the ABS system. I drove it today and the brake pedal pulsated/chattered one time like the ABS was actuating. The light came on then it went off, it's just screwd up. I paid about $20 from the dealer for the one rear sensor that bolts to the top of the rear differential. It didnt fix it, so I probly just wasted money.
We'll see what the shop comes up with tomorrow.