DTech22

My truck is an 02, found them behind the rotors. My speedo does vary slightly going down the road too. My abs and brake come and go too. Last time was when i crossed railroad tracks.

Where are my front speed sensors located? I replaced the rear speed sensor already.

Hey guys so i think i narrowed down the surging to one thing. P0500 obd code. I replaced the speed sensor in the tranny and it worked for a little while. Im still dealing with this issue. I ohmed the two wires to the pcm connector and they are good. My boss suggested a short to ground. I know its a wire issue now because i went over a bump and the abs/brake light came on again. What are some grounds and other things i can check? Battery terminals are new and clean. Anybody else have a problem like this? I have a p1693 code that follows after the p0500 is thrown too. Assuming that its because of the vehicle speed sensor circuit 1.