Help for installation in Grand Voyager

Hi All

Please excuse me but I am new to the Forum process.

My problem is that I have a 98 Grand Voyager 3.3 LE with the Infinity system. I have changed the head unit but have not used the wiring harness that was avaliable (£50). My problem is that I cannot get the speakers to work. The unit comes on , and works fine (when external speakers were attathced) but the factory ones dont seem to want to work. Do the Infinity speakers go through an Amp that is built into the car?. If so how do I get the Amp to work. Is it by putting power into the "Amp Remote" wire.  Please Help

There is a separate factory amplifier in the infinity system, and it needs to get approx. 12 volts on its turn-on wire for it to turn on.

CAUTION:  the only wire you may be seeing that says "amp remote" on it will be the wire in your aftermarket head unit's harness, and you do NOT want to apply any sort of voltage to this wire.  when the aftermarket head unit is turned on, voltage will actually be coming OUT from the head unit via that wire, so if you apply external voltage to the wire you run the risk of frying your head unit.

just FYI since the factory infinity amplifiers use a high-level signal for their inputs, most aftermarket head units will work just fine by using just the regular metra 70-1817 chrysler harness, which should definitely not cost you more than $20. 

IF you had that harness you would hook up your aftermarket head unit's remote turn-on wire (solid blue or, if present, blue white) to the solid blue wire of the chrsyler metra adapter labeled "power antenna".  Even though the metra harness labels the wire "power antenna", in the vehicles with infinity sound sytems, it's actually the factory amp turn-on.

If you've already clipped off the factory plugs I'd try to reattach them and then get yourself the standard chrsyler harness.  From there, it is just a matter of matching the colors of the metra harness to the colors of the aftermarket head unit, because both will comply to the EIA coloring standards.

In your situation, the only exception would be if your aftermarket head unit has both a solid blue wire (power antenna turn-on) and a blue w/white stripe wire (amp turn-on).  If so, then you'd connect the metra harness's solid blue wire to the blue w/white stripe wire of the aftermarket head unit's harness.

Also, sometimes there's a GREEN/ black wire that may have been attached to the chassis of the original infinity head unit.  If so, you need to make sure that gets hooked back up to a ground connection once your aftermarket head unit is installed.  This wire is the ground for the infinity amp and must be hooked up properly for the amp to turn on.