Lobo49, received your private message and was instructed to reply through forum. My shop is so far in the sticks it wastes half a morning or afternoon to go after a part so here's what we do for the needed diode. Take a junk GM alternater, internal or external regulater makes no difference, and punch out several diodes. You can see some of from the back of the housing--about 2/3's the size of a dime. After it's out and the lead is snipped take a test light and find which way it lets current pass. Put the test light clip on the negative battery post and touch first the "can" end of the diode to the positive post with the test light probe touching the snipped off lead. If it lights the flow is from the can to the lead and visa versa if it doesn't. Double check by touching the lead to the post and probing the can end. (I suspect diry minds are at work). Once the flow direction is found solder a lead to the can with a minimum of heat and cool immediately, then check again. Now install so the electrical flow is TOWARDS the alternater. This will let the alternater excite but not backfeed into the ignition. Tape off the diode since it is "hot". The wire will have a bump like a snake that's swallowed a rat but it works everytime. If you live somewhere near civilization you can go to a generater/starter/ alternater rebuild shop and get diodes, they have bins of them. I used to go to Radio Shack but the last trip there was told they no longer stock component parts--a shame.
