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996.2 radar detector hardwire

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trying to hardwire a radar detector to an 02 996 c2. fuse panel slot D8 (radio) looks like a good candidate for the add-a-circuit, but i dont have access to a multimeter to determine the load and draw sides. is anyone familiar with which side is load and which is draw?


Here is a photo of the fuse panel. i just need to know if A or B side is load



And here is the add-a-circuit i am using. some say pigtail side up, others say pigtail side down.




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  • 2 weeks later...

Use the factory cell phone spare plug located behind the center console (CD compartment). The plug offers switched and unstitched 12V.


Brown = Ground 

Red / Green = Switched 12 volts 

Green / Black = Unswitched 12 volts 

Yellow / Black = Telephone Mute



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  • 11 months later...

Isn’t the fuse box itself grounded?   When I did this I don’t recall a separate ground wire.  Ran telephone wire from fuse pigtail up A pillar to over rear view mirror and plugged in to V1 at left of rear-view mirror. I recall a good post on this with good pics.  Sorry I don’t have a better recollection.  Also wired a phone plug for use with remote display mounted on batwing where seat heater switches would have been. 

Edited by judgejon
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1 hour ago, leland said:

I have a 2004 GT3 in which I'm trying to hard wire radar detector to the heated seats fuse.  There is a lot of plastic around the fuse box, where do you find a good ground?



The dash has several grounding points, just follow any solid brown wire and you will find one.

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