I am using analog output #1 set to the specs on DIYAUTOTUNE (http://diyautotune.com/faq/faq.htm#LC1wiring). I cannot remember what color it is, but it is listed in the manual. I am not using the resistor, but I haven't had any issues with the signal or the correct readings.

AEM cam gears, .030 over, .020 milled head, Unorthodox UDP, port match intake/head, polished exhaust manifold, e-bay CAI, Magnaflow muffler

1995 GS A/T: Crushed, what started it all
1999 RS M/T: Back to stock
Mazdaspeed6: sold and quazi missed
1999 Eclipse GSX: HX35, waiting for Shep STG3