How are the wires marked?

I believe this is typical of GM columns:

G - single green: horn
H - double aqua: left front turn signal
J - double blue: right front turn signal
K - single purple: hazard
L - single purple: turn signal flasher
M - single yellow: left rear turn signal
N - single dark aqua: right rear turn signal
P - double white/orange: brake switch

Does that help?

~~ Alan Horvath
1954 Chevy Pickup
Singing his praises in the
Passing Lane