1968dave

This morning on my way to work brake warning light and ABS light came on and stayed on, no flashing just stayed on. I haven't had time to look at it yet, I will look under hood when I get home. Brakes seem to work fine and I don't think I have ABS brakes. Actually I am pretty sure I do not have ABS brakes. Brakes are less than a year old and front rotors were replaced as well. Front brake calipers are about two years old. Any suggestions on where to start trouble shooting. The only thing I could think of is fluid and fuse.
Oh by the way 1998 XL 4.2 150k miles
thanks

techrep

iTrader: (1)

LOL... if you did not have ABS then why would you have an ABS fault light ?? you may have a sensor going bad...should be one on each front hub and a rear speed sensor on the rear diff... have the fault code read and replace that part.

1968dave

Is it possible just to have rear ABS? I did the front brakes my self, changed rotors and pads. I did not see ABS on the front. I had a 2007 and replaced ABS sensors on that one. I am assuming they would be similar.

techrep

iTrader: (1)

Rear ABS would be pointless...you would want it on the front tires which do 75% of your braking...

1968dave

I was just doing some research on these forums and it appears that some 1998 f150s came with just rear ABS. Sounds strange but I read it on several threads. First time I ever heard of that. Anyway, I will start toubl shooting with the simple stuff first.

techrep

iTrader: (1)

Ok...so, there must be a rear speed sensor... never heard of just a rear ABS system..but, you learn something new everyday..

1968dave

lol. I also never heard of it. But thanks for responding.

02_Black_On_White

Maybe the same guy designed it that decided 4 or so threads in the 5.4 heads was a good idea. Lol.

Red-Ford

I'd point to the speed sensor, it should be ontop of the rear diff. Same issue happened on my brothers '96 Dodge 1500, and my uncles F-250, both ended up being the speed sensor. On both those trucks it was one bolt that held the sensor in, then the sensor just went in a hole. I'd take it out and try to clean it.

Past that, hows the brake fluid? Same lights came on in my 350 when I was low on brake fluid.

rcruz3568

Want s real mystery? lol my abs light comes on every time I drive it... Try to scan it and the tool reads no abs light is on. It also read 7 continuous codes in the gem module. Horn switch circuit 4x4 switch circuit door ajar ground circuit hell I can't remember them now but everything works as it should. Horn works 4x4 works everything works. Do a read out test all the abs sensors read the same mph while driving. No idea why the light comes on. Did a gem module test and everything seems fine