hmmmm, I fear you might be dealing with a previous owner hack job...
The wiring diagrams in this tecref will be helpful: https://www.camaros.net/forums/showthread.php?t=93576
PM me for the password, I'll be around the rest of the morning.
The left front turn signal wire is light blue, right front is dark blue.
Parking lights (the second filament in the housings) are brown.
The diagrams don't show a separate ground wire for 69's, they ground thru the mounting bolts. I'd start there, by removing one mounting nut from each, and putting a start washer on the stud and putting the nut back on.
The diagrams do not show ANY connectors in the front turn/park/headlight wiring.
The wires are daisy chained at the sockets, ie: on the left side, there are 2 wires in each socket connector, one from the firewall, one to the right side bulb, true for parking light, low beam, and high beam, turn lights of course are wiring separately.
The wire colors for any particular circuit NEVER change thru a connector, ever.
The right front turn signal wire is light blue, from the turn signal switch all the way to the bulb. Right rear is dark green.
Note these colors are used for other circuits wiring as well. Backup lights are dark green, wiper low speed is light blue, wiper high is dark blue.