# 2001 Toyota Sienna - new alternator, new problems

**URL:** <https://community.cartalk.com/t/2001-toyota-sienna-new-alternator-new-problems/175802>\
**Category:** Maintenance/Repairs\
**Tags:** sienna, toyota\
**Created:** [March 24, 2021, 5:15am UTC](https://community.cartalk.com/t/2001-toyota-sienna-new-alternator-new-problems/175802 "2021-03-24T05:15:36Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Ali34](https://avatars.discourse-cdn.com/v4/letter/a/e19adc/32.png) [@Ali34](https://community.cartalk.com/u/Ali34)\
**Post date:** [March 24, 2021, 5:15am UTC](https://community.cartalk.com/t/2001-toyota-sienna-new-alternator-new-problems/175802/1 "2021-03-24T05:15:36Z")

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I have installed the alternator after that causes dash board light not working and audio is not working either.

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**Author:** ![Cavell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cavell/32/43396_2.png) [@Cavell](https://community.cartalk.com/u/Cavell)\
**Post date:** [March 24, 2021, 2:07pm UTC](https://community.cartalk.com/t/2001-toyota-sienna-new-alternator-new-problems/175802/2 "2021-03-24T14:07:33Z")

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Runs fine? No dash lights when starting?

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**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\
**Post date:** [March 24, 2021, 2:53pm UTC](https://community.cartalk.com/t/2001-toyota-sienna-new-alternator-new-problems/175802/3 "2021-03-24T14:53:46Z")

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> [@Ali34](#):
>
> audio is not working

May need to have its code re-entered after its power was disconnected during the repair. See owners manual.

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**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\
**Post date:** [March 24, 2021, 6:08pm UTC](https://community.cartalk.com/t/2001-toyota-sienna-new-alternator-new-problems/175802/4 "2021-03-24T18:08:39Z")

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> [@shanonia](#):
>
> See owners manua

You do know that there are some on this site that will throw rocks at you for telling someone to look in the owners manual 😉

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**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\
**Post date:** [March 24, 2021, 7:17pm UTC](https://community.cartalk.com/t/2001-toyota-sienna-new-alternator-new-problems/175802/5 "2021-03-24T19:17:03Z")

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Where’d you get the alternator? Many aftermarket units are junk.  
Check for blown fuses. I hope you disconnected the battery before the work.

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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:** [April 2, 2021, 2:57am UTC](https://community.cartalk.com/t/2001-toyota-sienna-new-alternator-new-problems/175802/6 "2021-04-02T02:57:18Z")

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If you are talking about the battery warning light not working then you most likely have a bad alternator. The warning light circuit needs to ground through the alternator in order to make the light turn on.