i changed front pads and rotors and now i have thumping from passenger side. on 1999 Ford Explorer

i cleaned rotors prior to installing them.

Asked by for the 1999 Ford Explorer
3 answers
Replace both rotors.
recheck your work, sounds like one of the rotors is warpped
Missing or incorrectly installed brake pad clips. Caliper bolts not tight. Does the steering wheel shake when braking?