How to add two more speakers?
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From: tewksbury-ma
How to add two more speakers?
I have the alpine cdm 7874 hu in my regular cab f150. I want to put in two more speakers in the rear since it only has two up front. I looked behind the hu and cant seem to figure out how to hook up the speaker wire. How do i hook up the speaker wire?
Last edited by krazyballer; Mar 3, 2008 at 06:16 PM.
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From: Freeport, Fl
If you look on the back of the HU, there should be two sets of speaker leads for the rear speakers. They will be purple, purple/black, and green, green/black. The ones with the black stripe are negative, the other is positive. Run new speaker wires and hook it up.
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From: tewksbury-ma
Ok so i looked at the back of the hu and i see the grey and white purple and green. It goes from the hu to a block where the wires go into a harness and go somewhere under the dash. So do i tap the green and purple wires?
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From: tewksbury-ma
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From: Nebraska
Yes, just tap into the purple and green wires. You can see from your picture that those 4 wires are not hooked to anything in the factory harness. You can just tap into those wires where you spliced the Alpine and aftermarket harness together.
