# Can't see in the dark **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [April 4, 2009, 12:57am UTC](https://community.cartalk.com/t/cant-see-in-the-dark/28705 "2009-04-04T00:57:30Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![confused2](https://avatars.discourse-cdn.com/v4/letter/c/7cd45c/32.png) [@confused2](https://community.cartalk.com/u/confused2)\ **Post date:** [April 4, 2009, 12:57am UTC](https://community.cartalk.com/t/cant-see-in-the-dark/28705/1 "2009-04-04T00:57:30Z")
I have a 98 Firebird. When I turn on the lights the driver side motor runs to long and grindes down the gears in the motor. What stops the motor from running to long of a cycle? ---
**Author:** ![waterboy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/waterboy/32/764_2.png) [@waterboy](https://community.cartalk.com/u/waterboy)\ **Post date:** [April 4, 2009, 2:29am UTC](https://community.cartalk.com/t/cant-see-in-the-dark/28705/2 "2009-04-04T02:29:50Z")
I am not sure about the firebird, but other cars I have seen have vacuum controls, so my first guess would be a bad vacuum hose or diaphram. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [April 4, 2009, 3:51pm UTC](https://community.cartalk.com/t/cant-see-in-the-dark/28705/3 "2009-04-04T15:51:02Z")
The headlight door motors are controlled by the Headlight Door Module located in the fender in front of the left front tire. It sounds like HDM is malfunctioning. Tester ---
**Author:** ![confused2](https://avatars.discourse-cdn.com/v4/letter/c/7cd45c/32.png) [@confused2](https://community.cartalk.com/u/confused2)\ **Post date:** [April 4, 2009, 5:17pm UTC](https://community.cartalk.com/t/cant-see-in-the-dark/28705/4 "2009-04-04T17:17:30Z")
Thanks for the reply. I don’t think this type of setup has a vacuum system? Although, I will give it a look. Take it easy waterboy