# Foglights come on mysteriously!?!? **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** batteries\ **Created:** [April 18, 2008, 2:17am UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012 "2008-04-18T02:17:14Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Lugnuttz](https://avatars.discourse-cdn.com/v4/letter/l/9f8e36/32.png) [@Lugnuttz](https://community.cartalk.com/u/Lugnuttz)\ **Post date:** [April 18, 2008, 2:17am UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/1 "2008-04-18T02:17:14Z")
My wife’s 2002 Chrysler P T Cruiser has recently developed a “ghost in the machine”! Her foglights come on, by themselves, leaving her w/ a dead battery. Would removing the bulbs remedy the problem of running down the battery? She doesn’t use the foglights anyway. ---
**Author:** ![mmsamma](https://avatars.discourse-cdn.com/v4/letter/m/ed655f/32.png) [@mmsamma](https://community.cartalk.com/u/mmsamma)\ **Post date:** [April 18, 2008, 2:19am UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/2 "2008-04-18T02:19:09Z")
one post is sufficient ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [April 18, 2008, 2:22am UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/3 "2008-04-18T02:22:52Z")
Well, the bulbs certainly can’t draw power if you remove them. However, it would be easier to pull the relay or fuse. I suspect a bad fog light switch. Is it intregrated into the regular headlight switch in this car? ---
**Author:** ![Cougar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cougar/32/21348_2.png) [@Cougar](https://community.cartalk.com/u/Cougar)\ **Post date:** [April 18, 2008, 5:52am UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/4 "2008-04-18T05:52:00Z")
Pulling the relay is a better short term solution since the relay will draw some power also if it is in place. ---
**Author:** ![Lugnuttz](https://avatars.discourse-cdn.com/v4/letter/l/9f8e36/32.png) [@Lugnuttz](https://community.cartalk.com/u/Lugnuttz)\ **Post date:** [April 18, 2008, 12:45pm UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/5 "2008-04-18T12:45:18Z")
Sorry. I had to correct the year of the car. ---
**Author:** ![Lugnuttz](https://avatars.discourse-cdn.com/v4/letter/l/9f8e36/32.png) [@Lugnuttz](https://community.cartalk.com/u/Lugnuttz)\ **Post date:** [April 18, 2008, 12:48pm UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/6 "2008-04-18T12:48:51Z")
OK, if pulling the fuse is not the best solution, how does one pull the relay? ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [April 18, 2008, 1:36pm UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/7 "2008-04-18T13:36:19Z")
Once you locate the relay (look in your owner’s manual), you just pull it straight out. Come to think of it, the relay could be the problem in the first place! ---
**Author:** ![Lugnuttz](https://avatars.discourse-cdn.com/v4/letter/l/9f8e36/32.png) [@Lugnuttz](https://community.cartalk.com/u/Lugnuttz)\ **Post date:** [April 21, 2008, 1:00am UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/8 "2008-04-21T01:00:28Z")
I’ve pulled the fuse w/ no problems since. I could not find the location of the relay switch, even w/ the help of the owner’s manual. Any clues as to where it may be hidden? ---
**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\ **Post date:** [April 21, 2008, 1:28am UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/9 "2008-04-21T01:28:23Z")
Possibly in a fuse/relay box under the hood. Sometimes located close to the battery. If one is there, there should be a diagram of the fuses and relays on the bottom of the cover telling you what each controls. ---
**Author:** ![Lugnuttz](https://avatars.discourse-cdn.com/v4/letter/l/9f8e36/32.png) [@Lugnuttz](https://community.cartalk.com/u/Lugnuttz)\ **Post date:** [April 21, 2008, 6:02pm UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/10 "2008-04-21T18:02:20Z")
The fusebox is located to the left of the steering column. I’ll check it for any diagram for relays tonight. ---
**Author:** ![Ranck](https://avatars.discourse-cdn.com/v4/letter/r/aca169/32.png) [@Ranck](https://community.cartalk.com/u/Ranck)\ **Post date:** [April 22, 2008, 2:42pm UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/11 "2008-04-22T14:42:06Z")
The relay diagrams will be in the relay box, which is probably under the hood. Your owner’s manual should tell you where the relay box is. ---
**Author:** ![GatMan](https://avatars.discourse-cdn.com/v4/letter/g/d6d6ee/32.png) [@GatMan](https://community.cartalk.com/u/GatMan)\ **Post date:** [June 18, 2008, 2:50pm UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/12 "2008-06-18T14:50:10Z")
I had the same problem with my 2001 PT Cruiser. After I got estimates of several hundred dollars to fix it (I forget what the diagnosis was) I just pulled the fuse. ---
**Author:** ![americar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/americar/32/42_2.png) [@americar](https://community.cartalk.com/u/americar)\ **Post date:** [June 18, 2008, 6:54pm UTC](https://community.cartalk.com/t/foglights-come-on-mysteriously/13012/13 "2008-06-18T18:54:28Z")
Its a common problem with the PT Cruiser. The multi function switch is the source of the problem. Link to the part [http://ptboutique.com/items/pt-cruiser/pt-cruiser-parts/interior/mopar-interior/pt-cruiser-multifunction-switch-507304-ab-detail.htm](http://ptboutique.com/items/pt-cruiser/pt-cruiser-parts/interior/mopar-interior/pt-cruiser-multifunction-switch-507304-ab-detail.htm)