N_I,
All you need is a $10 multimeter from Dick Smith and a 1.5v battery.
Use the multimeter to find Power (Red prong on the cable, black prong on a bare part of the car body, should be ~13.5v all the time), ACC(As above but only 13.5v when the key is on ACC, Ground(Cable should be as thick as the Power or ACC, but no voltage reading. Put the multimeter on continuitity and test the ground cable and the body. There should be close to no resistance.
Then for the speaker wire. Use the continuitity tester on 2 cables (they should have been next to each other on the plug. (this is when you hope they don;t have a common ground) When you find 2 cables with a reading, get the battery and join each side to the wire briefly. If the speaker cone pushes out out, the cable touching the +ve end is the +ve cable. If it goes in, reverse the battery and test again.
When your doing all this be careful that the cables don;t touch each other and as soon as you work out a cable, tape up the wire and label it. You may need to get a spare radio fuse for the dash fusebox.
|