ABS issue

[Slow Ride]

I just got done with my 4/6 drop and after driving the truck about 5 or 6 miles the ABS light came on and Service Brake System warning cam eup on the dashboard. What things should I be looking for? Up front I disconnected the wheel speed sensors when changing the lower control arms, but reconnected them when I put everything back together. In the rear I don't remember seeing any wires. The rear must just use the VSS right? I also changed from 3.23 gears and 31.6 tall tires to 4.10 gears and 29" tall tires and have not yet recalibrated the speedo.

[foggy]

I also changed from 3.23 gears and 31.6 tall tires to 4.10 gears and 29" tall tires and have not yet recalibrated the speedo.

That's your problem right there, you must recalibrate for them.

[Slow Ride]

Thats what I figured. The VSS is saying the truck should be going WAY faster than the front wheel sensors are reading.

[tanz45]

you got it.

What year? Even after a tune you may still get lights occasionally. My 99 did after the recal.

[Slow Ride]

2005 - should have it done this weekend