If soldering the TT in, and for reference if altering a PNP harness. Picture thanks to SolphiSleeps.

HKS TT7 harness makes most any TT plug and play if altered correctly.
[url="http://my.is/forums/f114/tutorial-how-make-supra-turbo-timer-harness-work-272436/"]Here is a thread about altering an HKS TT7 for a Greddy timer[/url]
To retain the functionality of the stock alarm remote while counting down, the 'green wire' mod must be performed.
Per Chado
It was a very straightforward install (thanks to several older threads) using the HKS TT-7 harness with green wire mod.
And per Frydryce
Originally Posted by Frydryce View Post
ok so i just confirmed. if you are running the TT7 HKS Harness, all you need to do is cut the Green wire ON THE HARNESS GOING TO THE TT. this is the feed signal for IGN1 which needs to be disconnected. so cut the wire and secure both ends (electrical tape, shrink wrap, etc).
i just tested it and the car arms and disarms and whatever while the countdown is occuring.
[url="http://www.tokensolutions.net/products/HKS-TT%252d7-Turbo-Timer-plug-and-play-harness%2C-IS300.html"]TokenSolutions has HKS TT7 harnesses IN STOCK!![/url]
TS currently sells the [url="http://www.tokensolutions.net/products/Apexi-CLEAR-turbo-timer.html"]limited edition clear Apexi Turbo Timer[/url] that has additional features such as the a/f ratio display by tapping into the OE narrowband (therefore most useful for stoich readings), or through it's options can work with Innovate's LC-1.
Also available is the [url="http://www.tokensolutions.net/products/HKS-Turbo-Timer-Type-0.html"]HKS type 0 turbo timer with amber LED[/url], and the [url="http://www.tokensolutions.net/products/HKS-Turbo-Timer-Type%252d1-Special-Edition.html"]HKS type 1 special edition turbo timer.[/url]
TS also sells the [url="http://www.tokensolutions.net/products/Innovate--Auto-Timer%7B47%7D-Wideband-display-kit.html"]Innovate Auto Timer / Wideband Display Kit[/url]. It already comes with an LC-1 and sensor but also works with the LM-1 or LM-2. Pretty neat kit that addresses both accurate a/f display and functions as a turbo timer, and the LC-1 has an additional output for your EMS.
If anyone has anything more to contribute, please post up.
