Need Electrical Help!

Posted by syco3d on May 15, 2011; 2:43am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Need-Electrical-Help-tp2942419.html

First - just purchased my 1976 CB750k 2 days ago - so I'm VERY green yet.

Problem: Nothing (electrical) is working.

I fixed the wiring to the headlight last night, in doing so drained the battery to where the starter didn't have enough juice to function. Kickstarted it this morning, went on a short ride (less then 3 miles) came home, shut the bike off and put it on the charger (12v 2amp). Came back to the bike a couple hours later, and nothin. No lights no starter, nothin.

Checked the battery voltage - 12.5ish. Have power going to the starter relay (battery cables are good). I have power at the key (red wire), but as soon as I turn the key to run - nothin. Even the red wire goes dead.

Tried kicking it to make 100% sure of no spark. I'm at a loss. Apparently staring at it isn't fixing the problem, I've pored over the electrical diagrams, but I don't even know were to start.

Not a good way to start life with my new money pit...