build a JBL wiring harness?

So I want to change out the H/U in my truck but still wanna use the jbl speakers and amp but I dont wanna pay 100 bucks for a shitty wiring harness.

has anyone made their own or could point me in the right direction on how to do so? Im pretty decent with wiring stereos but it would be nice if someone already did it and could help.

 

The attached doc lays out the connections for the JBL wiring harness. This info was derived from the 05/06 wiring manual:

http://www.customtacos.com/tech/files/05FSM/wiring.html

It's a work in progress - still need to incorporate 2009+ changes such as where the microphone (for Bluetooth) gets connected as well as confirm ALL signals for the "Main" connector on rear of radio (R1). Incidently, the pin #'s (for R1) shifted to the right denote "confirmed". I have yet to pay the $15 necessary to access Toyota's online Tech reference to get the 09+ changes. Hope this helps.

 

I might try to do the same thing as the scosche ta07sr is a major piece of shit. With these diagrams I might be able to come up with somethin thanks a ton billyjoe!

 

I could be wrong but I thought that JBL interface box was like a pre-amp and did some either analog to digital or vice versa to the signal, but that you could use the cheaper JBL bypass harness to still use the speakers, just not the JBL amp. This harness just let you go from HU to plug at the JBL amp output.