# Sony Head Unit Install in '90

**URL:** <https://forums.speedlife.net/t/sony-head-unit-install-in-90/116229>\
**Category:** SON240sx Automotive\
**Created:** [June 13, 2008, 6:44am UTC](https://forums.speedlife.net/t/sony-head-unit-install-in-90/116229 "2008-06-13T06:44:19Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![fastback240](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fastback240/32/5591_2.png) [@fastback240](https://forums.speedlife.net/u/fastback240)\
**Post date:** [June 14, 2008, 9:22pm UTC](https://forums.speedlife.net/t/sony-head-unit-install-in-90/116229/10 "2008-06-14T21:22:31Z")

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> [@80's Import Meet 9/10](https://forums.speedlife.net/t/80s-import-meet-9-10/16536/20):
>
> one warning… there is a blue wire with a yellow strip(if memory serves me correctly) it shouldn’t be connected to anything on an Aftermarket deck make sure the und is taped and it dosent touch anything… if it gets grounded to steel or surged with power it will blow your TCU and your dash lights wont work…

then you go to the trouble of hardwiring your dash lights to other things and such and so on and so forth… painnnn

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