Forums/Z31P/z31-repairs-forums electronics/Weird stuff after 90Amp alternator install

Imported from Z31Performance.com Forums{{#if:frostvectron| — original post by frostvectron}}{{#if:2016-11-15 00:46:22|, posted 2016-11-15 00:46:22}}{{#if:3| · 3 post{{#ifeq:3|1||s}}}}{{#if:/Z31performance_archive/forum/z31-repairs-forums/electronics/533294-weird-stuff-after-90amp-alternator-install.html|
Local archive: view archived thread on dev.z31library.com}}

frostvectron: (2016-11-15 00:46:22)

Hey guys,

I just installed the maxima 90amp alternator into my Z and I am getting some weird stuff happening.

When I step on the brakes, my headlights flicker and my cd player resets. Eyeballing the gauge I can see a huge voltage drop that lasts just a split second when the brakes are applied.

Anyone have any idea what could be wrong? The alternator seems to be charging fine and it is outputting the proper voltage. Is it possible I screwed something up during the install or it is a new problem entirely? I looked around the rear hatch area to see if there was a loose ground for the brake lights, but did not find anything.

Alternator was new, not a reman, that I got off rock auto a few years ago… I hope it's not the culprit since I probably can't return it by now.

---

Pace: (2016-11-15 15:05:47)

Check for any loose grounds. The headlights in my 86T will occasionally flicker when I hit the brakes. I have yet to go through and recheck everything since reinstalling my 90amp alternator.

---

frostvectron: (2016-11-15 23:32:31)

Derp! Positive battery terminal just needed cleaning. It seems all better now. Guess I forgot that the car was sitting for a long time in addition to having just changed the alternator.

Thanks Pace, you hit the head on the nail!