Can anyone tell me where to hook up the sub to the RCA wiring harness. I just have rear and front outputs not a one for a sub? any help would be greatly appreciated

It's been a while since I installed mine, but IIRC there are cables from Pioneer that come off the unit for power, front/rear speakers, etc. However, for the sub-woofer you have to run RCA cables all the way to plug directly into the unit - if you have the install manual they are labeled SWR and SWL (for sub-woofer left and sub-woofer right),

Ok I see it thanks