72 chevelle electrical problem

[72drop]

The outer lights are brake lights / turn signals and the inners are just back up lights unless you changed them.



I have a 71 which was externally regulated so a bit different than your 72 which was the first year to be internally regulated. Is the main power feed on the bulkhead connector leading inside grounded? If it is then I would look at the ignition switch first and then the headlight switch. That is where the main feed goes after it passes through the firewall.

When you say the bulk connector leading inside, Do you mean the hot wire that powers up the fuse board? So i checked the ignition switch by un pluging all harness to the entire steering colunm. then check if that teminal was grounded and it was. Then i checked the headlight switch by taking the switch out and the teminal was still grounded. Not sure where to go from here.