# Brake light/shift lock fuse

**URL:** <https://community.cartalk.com/t/brake-light-shift-lock-fuse/46449>\
**Category:** Maintenance/Repairs\
**Tags:** sienna, toyota\
**Created:** [March 22, 2010, 6:38am UTC](https://community.cartalk.com/t/brake-light-shift-lock-fuse/46449 "2010-03-22T06:38:13Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![dannnu](https://avatars.discourse-cdn.com/v4/letter/d/a5b964/32.png) [@dannnu](https://community.cartalk.com/u/dannnu)\
**Post date:** [March 22, 2010, 6:38am UTC](https://community.cartalk.com/t/brake-light-shift-lock-fuse/46449/1 "2010-03-22T06:38:13Z")

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my brake light/shift lock fuse keeps blowing out each time when I replace it. can you tell me what the problem is.Thank you.

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**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\
**Post date:** [March 22, 2010, 1:07pm UTC](https://community.cartalk.com/t/brake-light-shift-lock-fuse/46449/2 "2010-03-22T13:07:29Z")

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You obviously have a problem somewhere in the circuit, such as a short. Someone will need to find it. There is no magic bullet. You just take a multimeter and start digging.

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**Author:** ![missileman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/missileman/32/1366_2.png) [@missileman](https://community.cartalk.com/u/missileman)\
**Post date:** [March 22, 2010, 2:22pm UTC](https://community.cartalk.com/t/brake-light-shift-lock-fuse/46449/3 "2010-03-22T14:22:08Z")

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I agree. There is a short in the circuit somewhere. The system is relatively simple so finding it should be easy.

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**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:** [March 22, 2010, 2:38pm UTC](https://community.cartalk.com/t/brake-light-shift-lock-fuse/46449/4 "2010-03-22T14:38:11Z")

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If the fuse blows when you press on the brake pedal then the trouble may be near the brake lights. If you have a wire harness for towing in the rear that is also a good suspect area to check out for a short.

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**Author:** ![dannnu](https://avatars.discourse-cdn.com/v4/letter/d/a5b964/32.png) [@dannnu](https://community.cartalk.com/u/dannnu)\
**Post date:** [March 22, 2010, 6:29pm UTC](https://community.cartalk.com/t/brake-light-shift-lock-fuse/46449/5 "2010-03-22T18:29:57Z")

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Thank you all for your help. The fuse blows when I press on the brake pedal as Cougar suggested.A friend told me it could be a brake pedal switch.My 2005 Toyota Sienna has only 36500 miles on it.Thanks.Daniel