Hi All,
I am close to finishing up my 72 240z and doing finishing touches, the last being JDM/Euro spec amber tail lights. Since the car is not going to use many functions going to the rear of the car I decided to wire it myself just for tail lights, rear side markers, and license plate light. The issue I am running into is how to wire a 72 or 73 4 pin 2.8mm spade connector tail light sub harness? A lot of the information online seems to be for early z cars with a 4 pin 6.3mm spade that has 3 wires on each of the upper bulbs. I know that I need to run an independent wire from the brake switch output wire that goes into the turn signal switch. The wire is Green / Yellow; all good there, but not sure how to modify the tail light sub harness.
A post on ClassicZ by Arne: https://www.classiczcars.com/forums/topic/32228-modify-us-240z-rear-turn-signal-wiring-jdm-style/ is helpful, but the first reply from OniZ mentions to make the lights work I need the early 240z 3 wire bulb socket on the inner upper bulb... Is that correct? Picture attached is my 72 240z sub harness and as you can see the inner upper bulb is 2 wires only.
I know Green / White is running lights, but not sure if it's brake light too. Also, Green wire on the sub harness is Green / Red or Green / Black on the main harness which are the turn signals, but also not sure if they are brake lights also.
Can anyone help? Do I need 3 wire upper inner bulb or can I make my current sub harness work?
Looks like I need to snip G from upper right bulb so only 1 wire goes to turn signal for Amber which is bottom right, but not sure about anything else. Goal is to have running lights and brake lights for 2 upper bulbs and just turn signal light on bottom right.