| M_Dubbs |
08-08-2013 11:59 PM |
Quote:
Originally Posted by SportInjected
(Post 1126547)
Use a line output converter (LOC), tap either the front or rear speakers from the headunit harness, then plug in the RCA cables into the LOC.
Use a wiring diagram to figure out which wires go to which speakers, or do trial and error with a AA battery (touch one wire to + and one to -, until you hear static noise coming from a speaker).
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Gonna be "that guy" here but my advice is to not go touching batteries to wires without properly testing them first. The problem with trial and error is that most of the time in a vehicle, speaker wires are twisted pairs of wire. The only other wires that are commonly twisted pairs are data and airbag wires. Do yourself a favor, and if there is a Harbor Freight near you, pick up one of their cheap digital multimeters (or one from any other place that sells tools), set it to the ohms setting, and with the aid of a wiring diagram, find the wires in a place that makes sense for them to be running (I would say behind the radio or in the kick panels in the harness going into the door would be great places to look. Once you find the suspected pair, strip a small part of them (not at the same time) and test the oh reading with the meter leads on both wires. If it is roughly in the neighborhood of 4 ohms, You have found your speaker wire. You can try a AA battery at this point. I'm not sure if your FRS has the same amp in the back that the BRZ limiteds do (those are the only ones I've worked on) but that is a great place to grab signal and remote turn-on. If you plan to ever replace the factory head unit, I strongly recommend connecting your ine-out converter behind the radio. This will save you the trouble of re-running cables once you get a radio with sub controls, if you ever do.
Sorry, that was long winded. I've just seen a lot of people make costly mistakes due to partial, but well-meaning advice. These cars are cake to work with so just use your resources, take your time, and have fun! |
