Wire Confusion

[DLuded]

i looked up the wiring diagram for my car and it says front left speakers are blue and black/white. when i looked in my car there are 3 sets of blue and black/white wires where the headunit whould be. my question is this. if i connect the wrong set of blue and black/white wires to my front left speaker will anything happen like will it blow a fuse or damage the speaker?

[danh]

once you are 100% sure the wires you are playing with are audio not power or illumination etc

just get a AA battery and stick one wire on each end, if you hear the speaker make a noise then you know those two wires are for that speaker.

to tell which wire is pos or neg, you need to see the speaker to see which way the cone moves...

[danh]

normally there will be 8 wires for audio.

2 for each speaker.

if you have a mulitmeter you can work out what all the other wires are by grounding the neg prong of the multimeter and testing each wire when you turn on the car or turn on the lights...

if you have a wiring diagram all the hard work should be done for you....

what car is it?

maybe someone out there can help you more specifically if we know the car...

[RANDY]

If you trace those wires, they'll probably meet up with the stock Nissan harness/plug. The wires you're seeing are probably from an old head unit.

If it's an R33, there is a good guide in the DIY section which describes which colour is which on the Nissan harness.

Lastly... if it's not a power wire (check with a multimeter), it shouldn't do any damage at all. Reversing positive and negative on a speaker generally doesn't do anything harmful either. I would definately recommend testing the wires on their own though.

Get a multimeter, set it to its continuity buzzer, alligator clamp one wire, and touch the speaker-end of the wire with the other end of the multimeter. It'll buzz if there is a "circuit" or "loop".