# 2005 Buick LeSabre backup lights don't work **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** lesabre, buick\ **Created:** [March 27, 2018, 2:34am UTC](https://community.cartalk.com/t/2005-buick-lesabre-backup-lights-dont-work/114494 "2018-03-27T02:34:03Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![ArlonSibert](https://avatars.discourse-cdn.com/v4/letter/a/7993a0/32.png) [@ArlonSibert](https://community.cartalk.com/u/ArlonSibert)\ **Post date:** [March 27, 2018, 2:34am UTC](https://community.cartalk.com/t/2005-buick-lesabre-backup-lights-dont-work/114494/1 "2018-03-27T02:34:03Z")
Backup lights don’t work. Bulbs are ok. ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [March 27, 2018, 12:34pm UTC](https://community.cartalk.com/t/2005-buick-lesabre-backup-lights-dont-work/114494/2 "2018-03-27T12:34:05Z")
Backup light signal is broken or the ground wire from the backup lights has corroded away. A voltmeter and ohmmeter will tell you the answer. Pull the backup light bulb, probe the 2 contacts with an ohmmeter with the other probe on a good ground. If one of the 2 gives you a good ground then get a helper. Have the helper start the car, shift into reverse while firmly holding the brake. Probe the contact that ISN’T the ground with a voltmeter. Do you have about 12 volts or so? No? Then a little more digging is in order. I don’t see a simple backup light switch listed on Rockauto which leads me to think the transmission range selector switch for the shifter may have failed. ---
**Author:** ![ArlonSibert](https://avatars.discourse-cdn.com/v4/letter/a/7993a0/32.png) [@ArlonSibert](https://community.cartalk.com/u/ArlonSibert)\ **Post date:** [March 27, 2018, 4:48pm UTC](https://community.cartalk.com/t/2005-buick-lesabre-backup-lights-dont-work/114494/3 "2018-03-27T16:48:23Z")
I don’t see any volts at the connector in the trunk. I haven’t ohmed out the bulbs , but on the trans. selector bracket there 3 switches but I don’t know which one might be for the B U lights. Thanks for your reply and Info… Arlon ---
**Author:** ![ArlonSibert](https://avatars.discourse-cdn.com/v4/letter/a/7993a0/32.png) [@ArlonSibert](https://community.cartalk.com/u/ArlonSibert)\ **Post date:** [April 2, 2018, 1:08am UTC](https://community.cartalk.com/t/2005-buick-lesabre-backup-lights-dont-work/114494/4 "2018-04-02T01:08:27Z")
Found broken Black/Grnd. wire in Bundle. Was short so stretched and broke with opening of trunk. Thanks for the helpful info. ARS P.S. Not much corrosion here in Las Vegas…