Apologies for not knowing what to call this harness. It runs between carpet and floor board supplying power to rear light harness. Basically a 6 flat wires in a sheath. 1964-65 is not the same. Thanks.

 

I'm not sure exactly which year Oldsmobile began bundling wires into the flat plastic sheathing from the fuse box between the carpet & the floor pan to rear of vehicle. Did you have a specific question regarding that flat plastic sheathing?

 

That sheathing was supplied by Fisher Body. The color code(s) & diagrams are contained in the Fisher Body Service Manual. Here are two diagrams from the 1971 Fisher Body Service Manual. I can't say if diagrams are contained in the Fisher Body Service Manual for 1966/1967 model years but I suspect they are contained in both 1966 & 1967 Fisher Body Service Manual.

 

it's called a ribbon cable
https://www.ebay.com/itm/22564569912...p=enc%253AAQAK

 

Thanks for all the great info. Purchased from e. Bay link provided.

 

For future reference, the convertible pump's power comes along in this in those cars. Accessories like rear speakers and vacuum trunk do not.