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How would I change an 04 coupe taillight harness to fit the 01-03 tail lights. A buddy of mine wants my atlezzas but he has an 04 civic and I'm pretty sure he'll have to modify it to fit. Anyone know?

I tried to just trade him for the 04's.

 
Rep Power: 469

so you want to change the 04's tailights to fit the 01-03's taillights right? just get the harness for it....

 
Rep Power: 312

just cut yer plugs off and swap them.. since you both will need what the other has.. its the free way to do it.. or you can get them from the stealership...
just be sure to label each plug with masking tape or something so you dont put them in the wrong place.. id suggest doing only one light at a time that way you can look at the other one to make sure you hooking them up right.. .. leave yerself an inch or two of wire attached to each plug.. then either solder them together or use wire connectors.. should only take you like an hour or so per car...