Antilock Brake Light-what Did I Hit

[dave300d]

Today I replaced both front rotors. So I had to take the calipers off. I took them off and laid them on a crate so they did not dangle.I put every thing back together and now my antilock brake light is on. It was not on before I started the job-but it is now. What did I hit--help.thanks.

Make sure the sensors are pushed all the way in.

[dave300d]

I know there are sensors that if your pads get low.A re these the sensors or are there other ones?

They is one on each wheel bearing housing (Spindle).

[dave300d]

So they are on the spindal not the calipers?

[sixto]

The trigger wheel looks like a timing belt sprocket inboard of the rotor. If you got dirt or grease between cogs, that could trip the ABS light. Likewise if bent some cogs.

Make sure the trigger wheel and sensor are clean.

Sixto
93 300SD 3.0 - comatose

[dave300d]

I forgot to add that it is on a 85 300sd-so it is the same problem?