Thread: Constant Power Only - Aftermarket Stereo

Please, do yourself a favor and go get the wiring harness, not from the moron that said you didn't need one though. Hit metraonline.com and search by your year/make/model and options and get the part number, then go shopping. And smack the first idiot you talked to - ALL cars need a harness, not a single one of them can plug right into the new head unit.

Looked it up, the part i need is another hundred bucks. I could care less about the chime and onstar.

I am doing this without the harness, i just need to know how it will affect the battery if i run a constant to the HU instead of a switched. I drive the car daily, will it discharge overnight?