So I got a 99 civic cx hb the car had 0 issues until recent where I noticed the speedo stopped working and later i also noticed I didn't have a fan not stressed about that......so I did the normal checked the speedo fuse that was good so I switch the harness plug still no speedo then I. Put an new speed sensor in the not 1 but 3 different ones from used out of working cars 2 new from AutoZone/advance ......I bought a new working wire harness also and still nothing only thing that was done 2 the car was after the tune i got a new s300 upgraded from v1 to v3 but even after that it still was working fine I'm lost its getting voltage from the 2 outta 3 wires on the speed sensor plug...lost need help I even tried old s300 and my buddy's s300 which had no issues

 

Post update it was the fuse box under dash