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Posted on Jan 02, 2017
Normally you red wire is the battery+. Black is ground-. Yellow should be battery backup which should go to your ignition. You wil then have either two sets or four sets of wires depending if its a 2 or 4 channel radio. For instance,Brown, and brown with a white stripe- White and white with a black stripe and so forth. these will be you speaker wires. In every instance you wire with the stripe will be your negative.
Posted on May 05, 2009
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Most all older GM cars using Delco wiring (up to about 1989-90) used the same wiring colors.
Locate three plastic plugs fanned out of a single harness bundle. Plug colors are blue, white and black. Each plug has four pin positions and may have four corresponding wires. All plugs are almost square, and have alignment ridges that guide insertion to specific slots at the rear of GM radios. A fourth, smaller and flatter plug may accompany the other three. This plug is usually connected for electronic preset and clock memory.
Locate the following colors on the blue plug for rear speaker connections:
Right: Negative=light blue, Positive=dark blue
Left: Negative=yellow, Positive=brown.
Locate the following colors on the white plug for front speaker connections:
Left: Positive=tan, Negative=light gray
Right: Positive=light green, Negative=dark green
Locate the following colors on the black plug for power connections:
Yellow=12 volts ignition, black=ground, gray=illumination, pink, if present, activates a power antenna.
The small, flat plug has an orange wire to a 12-volt battery for preset and clock memory.
Trace each wire through the adapter plugs, strip the ends applicable to the stereo you are installing and use crimp connectors to mate the wires with the stereo's output wires. Use a test light to test power and illumination connections. Use a multimeter to test for ground wire continuity and speaker connections.
Posted on Feb 24, 2011
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