# Shelby **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** crownvictoria, ford\ **Created:** [May 4, 2013, 6:35pm UTC](https://community.cartalk.com/t/shelby/79103 "2013-05-04T18:35:12Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![sidetrack](https://avatars.discourse-cdn.com/v4/letter/s/d78d45/32.png) [@sidetrack](https://community.cartalk.com/u/sidetrack)\ **Post date:** [May 4, 2013, 6:35pm UTC](https://community.cartalk.com/t/shelby/79103/1 "2013-05-04T18:35:12Z")
why after 3 or 4 plus days, a 1996 ford crown vic will not start. have replaced alternator, curtosey of the ford dealer. PLEASE HELP ---
**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:** [May 4, 2013, 6:37pm UTC](https://community.cartalk.com/t/shelby/79103/2 "2013-05-04T18:37:41Z")
Have someone check if there’s a parasitic current draw on the battery as the vehicle sits. Tester ---
**Author:** ![Stoveguyy](https://avatars.discourse-cdn.com/v4/letter/s/9e8a1a/32.png) [@Stoveguyy](https://community.cartalk.com/u/Stoveguyy)\ **Post date:** [May 4, 2013, 11:07pm UTC](https://community.cartalk.com/t/shelby/79103/3 "2013-05-04T23:07:53Z")
Maybe you need a new battery? ---
**Author:** ![Docnick](https://avatars.discourse-cdn.com/v4/letter/d/ecae2f/32.png) [@Docnick](https://community.cartalk.com/u/Docnick)\ **Post date:** [May 5, 2013, 6:44pm UTC](https://community.cartalk.com/t/shelby/79103/4 "2013-05-05T18:44:23Z")
I recall a similar “mysterious” problem with a Lincoln parked on a steeply sloping driveway. In that case, the trunk light switch (a mercury filled switch) was defective. On the level it was off, but on a slope it made contact and the trunk light drained the battery. Agree that there should be a thorough check for parasitic drains.