# Speedometer runs in reverse **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [April 19, 2008, 2:08am UTC](https://community.cartalk.com/t/speedometer-runs-in-reverse/13040 "2008-04-19T02:08:55Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![bradjones595](https://avatars.discourse-cdn.com/v4/letter/b/bc8723/32.png) [@bradjones595](https://community.cartalk.com/u/bradjones595)\ **Post date:** [April 19, 2008, 2:08am UTC](https://community.cartalk.com/t/speedometer-runs-in-reverse/13040/1 "2008-04-19T02:08:55Z")
After I replaced my battery the speedometer runs in reverse, why would this happen? / ---
**Author:** ![mmsamma](https://avatars.discourse-cdn.com/v4/letter/m/ed655f/32.png) [@mmsamma](https://community.cartalk.com/u/mmsamma)\ **Post date:** [April 19, 2008, 4:36am UTC](https://community.cartalk.com/t/speedometer-runs-in-reverse/13040/2 "2008-04-19T04:36:27Z")
I recommend you remove the reverse idler gear…then it will run in the proper direction. ---
**Author:** ![BustedKnuckles](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bustedknuckles/32/25_2.png) [@BustedKnuckles](https://community.cartalk.com/u/BustedKnuckles)\ **Post date:** [April 19, 2008, 12:42pm UTC](https://community.cartalk.com/t/speedometer-runs-in-reverse/13040/3 "2008-04-19T12:42:05Z")
What kind of car, year make and model? Most modern cars have a VSS (vehicle speed sensor) that sends the computer a signal to let it know how fast the car is going. The computer then relays the signal to the electronic speedometer in the dash. I suggest that you disconnect the battery, and let it sit for 30 mins. before hooking it back up. See if this resets the electronics.