help with stereo wiring

1,005

Asked by Rich Mar 14, 2016 at 11:03 PM about the 2007 Mercury Grand Marquis LS Premium

Question type: Maintenance & Repair

I have installed a new stereo system in my car.The radio works fine except the dimmer. That wire from what i can see on the after market attachment harness is not available. Metrax 70-5521 . Can anyone pleas tell me the function of the smaller connector and what the wires do? Thank you for helping

13 Answers

144,905

If you installed and after market radio and not a factory replacement,the aftermarket is not equipped for dimming,that is the wires to the left on the factory radio.

2 people found this helpful.
Best Answer Mark helpful
1,005

Thank you. On the smaller connector the one with white text under it. Do you know what that is used for?

2 people found this helpful.
144,905

Yes lighting and dimmer for the factory stereo,you want need it for the aftermarket stereo.

4 people found this helpful.
1,005

The thing that has me baffled is the second connector 2 blue wires which are used to turn on an amp and another used for a possible power ant. along with 2 rca jacks.. The jacks stumped me. what could that second connector use rca jacks for.. I didn't notice any power amps in the rear on the car

3 people found this helpful.
1,005

this is the connector i purchased instead of cutting the wires. I guess this could explain some of my confusion.

5 people found this helpful.
144,905

Yes, that is a mercury wiring harness for factory to aftermarket stereo.the one with coaxel is for amp,if your is equipped with it,other wise you want use it.

2 people found this helpful.
1,005

Alright Thank you so much for your help.. Enjoy your evening

1 people found this helpful.

I need help I have installed a aftermarket radio in my 2000 grand marquis i didn't have a aftermarket harness so I just tapped into the Stock wiring I'm not sure if it matters if I use a hardness which I don't think it should since I'm tapping into the Stock harness to from after market radio. Maybe I don't have to correct wires connected? Does anyone have the color codes. Also for my right rear positive I looked at what i think was the correct color codes it said the positive was a brown/pink but I didn't see any only brown/pink and pink/Orange nighter harness connected had them colors

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