I have never tried to install a SCION but there is a lot of documentation out there.
Have you seen these two STICKIES?
http://www.toyota-4runner.org/audio-electronics/36137-scion-t1807-install-3rd-gen-99-limited-pic-heavy.html
http://www.toyota-4runner.org/audio-electronics/56441-ultimate-scion-headunit-stereo-thread.html
Hey man, thanks for the link, post #53 solved it for me. pretty newbie mistake (not knowing to remove the amp) but its figured out now. In case anyone else makes the same mistake I did here is the info:
http://www.toyota-4runner.org/838835-post52.html
Well FRACK!
Soldered up the Scion head unit last night. Followed Falcon115's instructions so there is no need to document that. http://www.toyota-4runner.org/audio-electronics/84630-t1814-installed.html
However, I go out to install it today and guess what..
Scion -
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Stock 4runner.
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Even better, i have two antena wires! :redbrick:
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I'm not sure what to do at this point.
My truck is a 1998 SR5
Follow that plug wire to a little silver box behind the radio - that's your old amp, probably!Remove the amp and you will find the wires/plugs you need plugged into the back. The new radio has an internal amp.
Plug in your larger antenna wire and tape off the small one. Works fine.