old wiring colours

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=25698
Printed Date: May 13, 2025 at 9:39 PM

Topic: old wiring colours

Posted By: oldsparky
Subject: old wiring colours
Date Posted: February 02, 2004 at 1:27 AM

My friend has pulled out an old aiwa sterio from his car but didn't label the wires. i connected 1 blue(with fuse) 1 white to 12+ve , 1 thick black connected -ve, this gets the display ect working.but no sound, there are 2 red,2 black all showning +3v, 2 light blue, 2 orange showing 0v i assumed they would be the speaker wires but i carn't get any sound out. any suggestions would be great (he still wants to use the old radio)

Cheers

Replies:

Posted By: geepherder
Date Posted: February 02, 2004 at 8:40 AM

You said you got the display to come on, that's a start. Have you tried hooking speakers to the red and black wires? If not, you can always crack the case open and have a look (reverse engineer). Find the output transistors which go to your speaker leads.

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My ex once told me I have a perfect face for radio.

Posted By: oldsparky
Date Posted: February 10, 2004 at 12:07 PM

Nope still no go with the sound. Do you know what's the normal output voltage to a speaker?

Posted By: jae-rome
Date Posted: February 10, 2004 at 1:35 PM

what model aiwa is the h/u?

Posted By: spl_enterprise
Date Posted: February 10, 2004 at 4:36 PM

use a voltmeter. and write down which wires you have tried on a sheet of paper, sometimes its all trial and error, unfortunately.

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Pete - SPL Enterprise Inc.

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