but there is no wire that color im having so much trouble with this any suggestions ohh and there was a wierd wire with a circle on it screwed tp mt stock deck any suggestions???????

The wire with the circle terminal is your chassis ground to the radio.check out the website .The12volt.com for wiring colors for your make, model.

GROUNDS ARE BLACK ON CARS, GET TEST LITE AND CHECK IT

Try buying a 12volt light test probe and use it to double check what wires are the ground .

Hope that helps and best of luck.

The only ground wire on your Concord that is BK/LB is the oxygen sensor ground. You do not test a ground with a test light. You use a good digital meter with a millivolt scale. One clip on the negative battery post and the other on the ground. Should be below 10mv. anything over 40mv shows resistence on the ground circuit.

if you had a premium radio the ground wire was black and in pin 11 of the radio connector. if it was a base radio the ground wire was a strap bolted to teh back of the radio with a 3/8'' bolt.