Wiring Issue - 92 Caddy Seville

I just did one of these....

I got a GMK-344 Wiring harness ( I believe this is the correct Number) from American International...Go to the trunk and unhook the set of plugs on the bottom of the Amp (Should be 3) and also unplug the Antenna wire....Get the harness and plug up the speaker section of the harness only...Check the impedance of the factory speakers cuz I think that the stock speakers are like 1 ohm and you cant plug those into your Aftermarket HU...If they are one ohm you will have to replace the stock speakers...

Then Plug the Power section of the harness Back into the amp...You have to have the amp pluged in so that the harness up front is powered...Or you can jump the power around the amp and into the harness that is on top af the amp that goes up to the front of the car...or just make your own power hook ups up front...

Run wires from the aftermarket harness that you plugged in up to the front to get your speaker connections....

Go to Autozone or Advanced Auto and Buy an FM Antenna Extension cable....Plug that into the antenna in the trunk and route it up front as well.....

Then you have 2 choices of how to power the antenna...Either run a wire from the head unit to the relay to activate the elec antenna or grab power at the amp and have the antenna extend when you turn on the car....

Thats all I can think of right now.....

Making the World A Louder Place

OK to start these cars are a pain....

Go to the trunk remove the cosmetic cover piece from the front of the trunk against the back seat so you can see the amp...The amp is on the left side of the trunk...Should be a silver box with heat sink fins on one side....

On the bottom of the amp there are 3 plugs...These are the plugs AFTER the amp where you will get your speaker connections...On TOP of the amp there are 2 Plugs...These go to the front of the car to the factory head unit Thats where you will get power for the aftermarket HU...

You will need this harness (Nevermind what it says about not fitting)....

On the bottom of the amp unplug the 3 harnesses...Plug in the 2 speaker harnesses into the aftermarket harness (They only fit one way so you will know which is which)...This is important The harness that goes to the power section of the aftermarket harness plug it back into the amp....do this so that the harness in the dash will be powered and grounded...OR....Make jumpers around the amp connecting the power to the top harness so the wires up front are hot...If you do this UNPLUG the 2 harnesses from the top of the amp also.

NOW...Get a Digital Multi-Meter and check the impedance of the factory speakers...I believe the factory speakers are 1 ohm...(the car I worked on already had the speakers replaced) IF the factory speakers are NOT 4 ohm or higher you will have to replace them before you hook your aftermarket deck to them.. If they are 4 ohm and up connect some speaker wire to the aftermarket harness you bought and run them to the dash to connect to your HU...

Go to Autozone or Advanced Auto and get an FM antenna Extension Cable....Also get a GM ANTENNA ADAPTER...

Plug the Adapter into the stock Antenna in the trunk...Then plug the Extension cable onto that..Run the extension cable to the dash...Also you have to power the antenna so either run a wire from your aftermarket unit (remote turn on) to the relay on the antenna to activate it or get ACC power from the rear at the Amp harness that you plugged back into the amp on the bottom... (Antenna will extend when the car is on)...

On the dash harness use the multi meter and find 12+ GND and ACC....I think if I remember...The Yellow Wire on the factory harness is 12+....The brown wire next to the Yellow is GND....And there is a BROWN / Blue(???) on the other end of the same harness that is the ACC.....

Make all the proper connections and you are in business.....

After I did the one...My advise is Leave them be....I could not find an adapter so that I would not have to do all the above if you find one please post back to tell me...

This is all I can think of but I have a high fever at the moment...I dont think I left anything out....

GOOD LUCK AND HAVE FUN!!!!

Making the World A Louder Place