I'm hoping you can give me some insight. You mentioned in post that the orange wire for the radio doesn't have to be connected. I've wired my vehicle up and everything works great except now my backlight for the speedo and tach etc doesn't come on. I noticed on the wiring that the illumination wire has a + and a - negative do these have to be connected? since I'm not wiring through the stereo?
Or is it something else. I've checked the fuses and they are all good. I'm at wits end as to why the heads up lights aren't working.
I'm currently attending college to finally finish my degree in Computer Information Systems, and have been professionally installing mobile electronics (basically anything into a car/suv/truck/bus/etc) for over 11 years