I've replaced ecm board abs module upper and lower speed censor rear censor on rear defrencial..checked all fuses and my abs,brake light and check engine light stays on and my speedometer drops to zer
Definitely sounds like a vehicle speed sensor problem. Have the computer scanned and post the trouble code(s). Most auto parts stores will scan your computer for free. HTH. -Jim
I know this sounds out there but check your wheel bearings. I had a abs light and we couldn't figure out why. the wheel bearing was going and we couldn't tell right away.
My make and model doesn't have censors on the rotors themselves or on the bearings.
Then do what Jim said and have it scanned for codes
Looking for a Used Ram 1500 in your area?
CarGurus has 12,833 nationwide Ram 1500 listings starting at $1,995.
Search Dodge Ram 1500 Questions
Dodge Ram 1500 Experts