See if this helps
Hi Lurch, I am George,
the harness I have is same style, different color alignment, it is as follows:
10a-lt blu---- 10b-dk grn
11a-dk blu--- 11b-lt grn
some match the charts you sent me, some do not.
While the pin location is different the wire colors & connections should remain the same
Ok, now on the matter of the double wires on the wire assy, two blk, org, gray and dk blu.
Does it matter which of the two org and blk on the harness I connect then to?
Also, I have two dk blue and two gray on the wire assy, but only one of each on the harness.
Can you post the complete Model Number of the 71 Series PlugsThis is METRA correct?
Also, Which Engine in the Impala?Is this the Original Radio or a different Delco than what came with vehicle?
71-2003-1 (OEM Harness Full Pin GM 98-08 Wiring Harness)
A V6 - 3800 Series and it is the original radio.
Do you have the wiring Guide from METRA for it, that shows the Pin configuration?
Sorry, was misunderstanding
To test for DATA, you need to use a Volt / OHM Meter & the DATA wire should give you a pulse.Voltage wires should show as the plugs show aboveTest each wire as you go for voltage, (with lights on, key on, etc)Speaker wires will be a little harder, as they will show the same for all, if this is going thru the Factory AMP. If it is, you can unplu AMP & test from Radio to AMP Plug of each wireIf no AMP, you can use a AA Battery across the Speaker wires to find the correct ones