# Why can't I find vacuum diagrams in Haynes?

**URL:** <https://community.cartalk.com/t/why-cant-i-find-vacuum-diagrams-in-haynes/23705>\
**Category:** Maintenance/Repairs\
**Created:** [December 21, 2008, 7:40pm UTC](https://community.cartalk.com/t/why-cant-i-find-vacuum-diagrams-in-haynes/23705 "2008-12-21T19:40:22Z")\
**Posts on this page:** 7\
**Page:** 1

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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:** [December 21, 2008, 7:40pm UTC](https://community.cartalk.com/t/why-cant-i-find-vacuum-diagrams-in-haynes/23705/1 "2008-12-21T19:40:22Z")

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My '00 Silhouette - bought the Haynes manual for it - and if the vacuum diagrams are in there I can’t find them. (Whole chapter on wiring though).  
  
  
  
 Anyone know if Haynes don’t include these? Or if I’m missing them? Or where I might be able to find them - I have searched the i’net & haven’t come up with them.

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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:** [December 21, 2008, 7:41pm UTC](https://community.cartalk.com/t/why-cant-i-find-vacuum-diagrams-in-haynes/23705/2 "2008-12-21T19:41:36Z")

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BTW: have already tried the autozone site as well.

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**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:** [December 21, 2008, 7:52pm UTC](https://community.cartalk.com/t/why-cant-i-find-vacuum-diagrams-in-haynes/23705/3 "2008-12-21T19:52:45Z")

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The emission sticker under the hood should reflect all vacuum circuits used on the engine.

Tester

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**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\
**Post date:** [December 21, 2008, 7:55pm UTC](https://community.cartalk.com/t/why-cant-i-find-vacuum-diagrams-in-haynes/23705/4 "2008-12-21T19:55:58Z")

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No separate chapter on vacuum systems in this Haynes.

The ones who MAY have a link to possible vacuum diagrams would be OK4450, Hellokit and other techs.

Which vacuum system are you looking for? PVC`s are a vacuum system for one.

(I have an '00 Silo too)

P 2B-4 in the Haynes manual #38066 shows Vacuum gauge diagnostic checks.

Like Tester said, Emissions (EVAP) sticker is the only one I have under my hood too.

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**Author:** ![BarryNNJ](https://avatars.discourse-cdn.com/v4/letter/b/bbe5ce/32.png) [@BarryNNJ](https://community.cartalk.com/u/BarryNNJ)\
**Post date:** [December 21, 2008, 8:24pm UTC](https://community.cartalk.com/t/why-cant-i-find-vacuum-diagrams-in-haynes/23705/5 "2008-12-21T20:24:36Z")

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Tester said

> The emission sticker under the hood should reflect all vacuum circuits used on the engine.  
> …I’ll just add that is true for all makes and models.

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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:** [December 21, 2008, 9:34pm UTC](https://community.cartalk.com/t/why-cant-i-find-vacuum-diagrams-in-haynes/23705/6 "2008-12-21T21:34:49Z")

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Doh! (forehead smack) It is indeed under the hood - thanks!

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**Author:** ![MikeInNH](https://avatars.discourse-cdn.com/v4/letter/m/a587f6/32.png) [@MikeInNH](https://community.cartalk.com/u/MikeInNH)\
**Post date:** [December 22, 2008, 4:30pm UTC](https://community.cartalk.com/t/why-cant-i-find-vacuum-diagrams-in-haynes/23705/7 "2008-12-22T16:30:49Z")

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The only manuals I’ve seen that have vacuum diagrams or complete electrical schematics are the shop manuals.