Leaderboard

Bingo! Last time my Z was in the shop for a checkup on my Rebello engine, the new wrench decided to replace the battery (which really didn't need replacing). The power cable for the dual headlight relays is black, so the new wrench assumed it went to the negative post on the battery. Moved it back to the positive post and headlights work again. Thanks so much for your help! It might have helped if the MSA kit had a red power cable or at least a "+" tag on it.

No offense but I'm going to guess that you don't feel comfortable doing electrical system diagnosis. There really should be several voltage measurement reports here. At the headlight switch (input and exit), at the fuses (left and right), at the headlight sockets, etc. And at the relay socket pins before you replaced the relays. That's the way to do it, you shouldn't pull or replace anyhting until you've taken a measurement or probed with a test light. You've pulled fuses and replaced parts but haven't reported any actual measurements. I'd start at the headlight fuses. They're easy to get to and you can go forward or backward from there. Measure from each side of the fuse to ground with the headlight switch on.