multiple wires in harness

so my car got broken into, and they cut my stereo wiring harness, now ive followed the12volt vehicle wiring and ive got a couple of wires that are double, should i be hooking both wires to my new deck harness or do i only need one? i dont wanna start blowing fuses everywhere, any help is appreciated, thanks

graham

I dont think there should be double of any wires. The speaker wires will be the same color but one will have a stripe.  If I  were you I wouldnt hook two into one spot because that doesnt seem right.  What kind of car and deck do you have.

Set to DC volts, on a scale that can easily read 12 volts.  Touch the black probe to ground (cigarette lighter rim, outside of antenna, etc.), touch the positive probe to your wires one at a time.  When you find a wire you suspect is the constant, turn on the parking lights and see if the reading changes.  If it does not, this is your constant (connect to yellow).  Now test for the wire that only has power with the key turned- this is your switched (connect to red).  Take the black wire of the new radio directly to ground behind the dash.

Now for the speakers- set the meter to resistance, and test pairs of wires until you get a reading of around 4 ohms.  Touch a small battery to the wires and listen for a pop to identify which speaker it is.  If the cone moves out toward you, the wire touching the positive battery terminal is positive, the other negative.  If the cone pulls in away from you, it's the other way around.  Do this until you identify all the speaker wires. 

If you can't find any speakers there, you may have a factory amp, and you can test the wires there, or just run new wires to the speakers.  Tape off any wires you don't use.

You can also use a 9volt battery to test for speaker wiring.