2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

which wire is negative?

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Old Mar 17, 2002 | 12:15 PM
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which wire is negative?

I did a search but could not find the earliar post about the wire color guide.

I am putting in new door and front kick panel speakers.

I looked at
http://www.angelfire.com/tx3/rx7/2ndwire.html
but my front right door wire colors are:

Grey
Grey/blue

I am looking at the FSM but cannot make sense of the wire color...

anyone know which one is negative?

TIA
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Old Mar 17, 2002 | 01:17 PM
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here is the wiring diag from the FSM

could someone pls explain to me what the codes mean.
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Old Mar 17, 2002 | 01:28 PM
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lg is light green, r is red, w is white, y is yellow

"lg/r" means LG wire with red stripe.

what year is the car and what year is the pic? they are probalby different for series 4/5.

are you using the stock deck? if an aftermarket you need to run new wires anyways.
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Old Mar 17, 2002 | 01:33 PM
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scott

it is 90 GXL couple with stock cassette head with stock graphic equalizor. and power antenna
everything is stock,

is that the wrong diag I am looking at?
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Old Mar 17, 2002 | 01:53 PM
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I've got a Grey/Red and Grey/Blue wire, going to the LH front speaker. According to the FSM, GR is Pos, G/L (blue) is Neg

PauLC
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Old Mar 17, 2002 | 02:26 PM
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correction:
blue and grey wire, I examined the blue wire closely, the area which was in contact with the other grey wire did not have any color,

see pic,

so I am going by PauLC, I am connecting the blue to the negative term of the speaker....

if I am wrong am I going to destroy something?
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Old Mar 17, 2002 | 02:35 PM
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no the speakers will work both ways. you probably couldn't even tell the difference.
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Old Mar 17, 2002 | 05:30 PM
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Originally posted by Scott 89t2
no the speakers will work both ways. you probably couldn't even tell the difference.
Actually it makes quite a bit of difference to sound quality. Use a circuit tester to confirm which wires are which. Another test is to wire up the speakers, disconnect the wires at the head unit end and bridge them with a 1.5V battery. If the speakers are correctly wired the speaker cone will pop out, if it's wrong it'll pop in.
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Old Mar 17, 2002 | 08:36 PM
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Get a 1.5V battery (D, C, AA, AAA) and connect the wires leads.&nbsp If you connect the battery and the speaker cone goes UP, then you got + battery to + speaker terminal.

Don't trust color codes or manual labels, as I've seen too many speakers actually reverse polarity.&nbsp You actually should be running the speakers and flipping polarities to give you the loudest sound from your seating position...



-Ted
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Old Mar 17, 2002 | 10:26 PM
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if you hook it up backwards the sound will be out of phase and sound funkay!

at least I can tell, my friend didn't notice when he had his backwards.
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Old Mar 17, 2002 | 10:47 PM
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Not necessarily...&nbsp Due to the stupid mounting angles and pathlengths, reverse polarity might make the system actually sound better...



-Ted
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Old Mar 18, 2002 | 12:33 AM
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holy crap...I have already connected them and I am done with the front door speakers, used the blue to be negative. well they do not sound bad, could be out of phase, but with them producing only around 100 hz or so I am not going to take to it apart.

I have ordered 4inch polk for the dash, I will definitely use the battery trick to test the + wire.

thanks everyone for their input.

Last edited by stockrex; Mar 18, 2002 at 10:01 AM.
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