# wiring help

**URL:** <https://forums.speedlife.net/t/wiring-help/212801>\
**Category:** SON240sx Automotive\
**Created:** [May 25, 2011, 9:44pm UTC](https://forums.speedlife.net/t/wiring-help/212801 "2011-05-25T21:44:40Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![Turbo\_Crazy](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_crazy/32/5730_2.png) [@Turbo\_Crazy](https://forums.speedlife.net/u/Turbo_Crazy)\
**Post date:** [May 25, 2011, 9:44pm UTC](https://forums.speedlife.net/t/wiring-help/212801/1 "2011-05-25T21:44:40Z")

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so I am installing an aftermerket fuel gauge but need to know which plug and which wire i need to use from the original cluster plugs to tap into to make it work

thanx in advance for any help

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**Author:** ![Maverick](https://avatars.discourse-cdn.com/v4/letter/m/258eb7/32.png) [@Maverick](https://forums.speedlife.net/u/Maverick)\
**Post date:** [May 26, 2011, 4:23am UTC](https://forums.speedlife.net/t/wiring-help/212801/2 "2011-05-26T04:23:08Z")

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FSM

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**Author:** ![Turbo\_Crazy](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_crazy/32/5730_2.png) [@Turbo\_Crazy](https://forums.speedlife.net/u/Turbo_Crazy)\
**Post date:** [May 26, 2011, 10:20pm UTC](https://forums.speedlife.net/t/wiring-help/212801/3 "2011-05-26T22:20:19Z")

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whats FSM

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**Author:** ![MP\_B240](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mp_b240/32/5697_2.png) [@MP\_B240](https://forums.speedlife.net/u/MP_B240)\
**Post date:** [May 26, 2011, 10:26pm UTC](https://forums.speedlife.net/t/wiring-help/212801/4 "2011-05-26T22:26:09Z")

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service manual

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<div class="post-metadata">

**Author:** ![Turbo\_Crazy](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_crazy/32/5730_2.png) [@Turbo\_Crazy](https://forums.speedlife.net/u/Turbo_Crazy)\
**Post date:** [May 27, 2011, 11:07pm UTC](https://forums.speedlife.net/t/wiring-help/212801/5 "2011-05-27T23:07:37Z")

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dont got one, anyone know where to find the wiring online?

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<div class="post-metadata">

**Author:** ![Maverick](https://avatars.discourse-cdn.com/v4/letter/m/258eb7/32.png) [@Maverick](https://forums.speedlife.net/u/Maverick)\
**Post date:** [May 28, 2011, 7:38am UTC](https://forums.speedlife.net/t/wiring-help/212801/6 "2011-05-28T07:38:56Z")

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google for the factory service manual. they are there for all year of 240/silvia and with the convertible supplement.

Edit:

Checked the fsm for you and the wire you are looking for, the fuel gauge signal wire, is green with blue stripe. There should be two wires on the gauge, one gree/blue (G/L in the fsm) and a black one. The black one goes to a body ground.

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<div class="post-metadata">

**Author:** ![Turbo\_Crazy](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_crazy/32/5730_2.png) [@Turbo\_Crazy](https://forums.speedlife.net/u/Turbo_Crazy)\
**Post date:** [May 31, 2011, 10:27pm UTC](https://forums.speedlife.net/t/wiring-help/212801/7 "2011-05-31T22:27:07Z")

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Yup did some wire testing and thats the one i found that was the signal wire.

Thanx

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<div class="post-metadata">

**Author:** ![Maverick](https://avatars.discourse-cdn.com/v4/letter/m/258eb7/32.png) [@Maverick](https://forums.speedlife.net/u/Maverick)\
**Post date:** [June 1, 2011, 5:54pm UTC](https://forums.speedlife.net/t/wiring-help/212801/8 "2011-06-01T17:54:06Z")

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chalk one up for the FSM