I have a vehicle stereo deck that has an IR receiver input (+) and a steering wheel control module that has an IR emitter LED (+/-). The steering wheel control module, "translates" (using a mapping created during programming) the button presses on the steering wheel to an IR output — the idea being that you can still control aftermarket stereos equipped with IR receiver LEDs with the steering wheel controls (which are normally proprietary to the vehicle make).
Unfortunately the aftermarket stereo I purchased does not have an IR receiver LED built into it, so it cannot be controlled purely by IR. However, the aftermarket stereo does have an IR-in (+) wire, just no IR receiver LED attached to it. At this stage of the explanation, the setup looks like this:
Of course I'd like to actually have steering wheel controls for my aftermarket stereo, so I'm wondering how to connect this all together without having to buy and hookup an IR receiver LED (which honestly I don't even know if it's that easy to do given the lack of documentation for this stereo). Can I just cut off the IR Emitter LED from the steering wheel control module, isolate the IR Out (-), and hook the IR Out (+) directly to the aftermarket stereo's IR In (+)? Like so:
My instincts tell me it seems too simple…