O.k., I bought a '95 3.8l convertible from my friend. He mangled the wiring under the dash and doesn't have the factory amp or radio anymore ( or harnesses ) so I took a sony head unit that was sitting in my garage and tried to install it. I've installed radios before ( not Sony ) and did a pretty good job but this has me stumped. I know most people use a bypass harness but since it plugs into the amp ( which I don't have ) I figured I have to do some rewiring. I found the speaker wires and connected them just fine. When It was time to do the power, i had no problem finding the constant and accesory wires. Here's the problem....The harness that the stock radio plugged into has THREE grounds, and there's ANOTHER 12v constant coming from under the driver side dash ( I assume to power the amp ). I capped the extra constant wire and connected a ground to the sony harness and it worked! Problem is, my airbag light started flashing and the next day, my car wouldn't start unless I turned the headlights on first! After that I tried connecting and reconnecting grounds and I think I blew several fuses. Does anyone know about the wiring on this car? I can't find any schematics detailed enough to trace the problem. I think that the 12v constant that went to the amp somehow completed a circuit through the radio (for the airbag?!) and now it's open. Also, what do I do with three grounds when there's only one wire for ground on the sony harness and no illumination wire ( there is one on the car though). I'm sorry this post is so long but I wanted to describe the problem in detail. Thanks in advance.p.s. now my car won't start. Accessory works but not start.
