jay28 Posted June 20, 2011 Share Posted June 20, 2011 Hi all Ive just installed a new alternator, however it's an internally regulated alternator so I'm now having problems with run on. I'm looking for a plug in diode. If someone has one or knows where ide get one that would've great. Thanks Jay Quote Link to comment Share on other sites More sharing options...
bigbreak_2000 Posted June 20, 2011 Share Posted June 20, 2011 Radioshack. i can get you the part # later when I'm home. Only couple cents. You get two in the bag. I had to go through this with my 1981 280zx when I upgraded to MSD ingition system. Never had the run on problem before the upgrade. But problem solved by the diode. Quote Link to comment Share on other sites More sharing options...
jay28 Posted June 20, 2011 Author Share Posted June 20, 2011 Cool thanks for that. I'm afraid I'm completely hopeless at wiring. I read somewhere where you can get a plug in diode. It plugs directly into where the regulator goes? Quote Link to comment Share on other sites More sharing options...
jay28 Posted June 20, 2011 Author Share Posted June 20, 2011 Cool thanks for that. I'm afraid I'm completely hopeless at wiring. I read somewhere where you can get a plug in diode. It plugs directly into where the regulator goes? Quote Link to comment Share on other sites More sharing options...
NewZed Posted June 20, 2011 Share Posted June 20, 2011 Maybe you read about the MSA conversion kit - http://www.thezstore.com/page/TZS/PROD/12-4068 Did the engine run on before? And did you just swap an internally regulated alternator for an external, without rewiring? I'm not even sure what would happen if that was attempted. What year car and how did you get in to this situation? Quote Link to comment Share on other sites More sharing options...
jay28 Posted June 21, 2011 Author Share Posted June 21, 2011 Yeah. I bought a new alternator not realising it was an internally regulated one. I just swapped them straight over without changing anything. Then of course I had the run on issue. I was then told I need a diode but wasn't told any rewiring was required? It's an early 1974 260z austrailian import Thanks Quote Link to comment Share on other sites More sharing options...
NewZed Posted June 21, 2011 Share Posted June 21, 2011 I have a 280Z that was externally regulated so can't speak directly to a 260Z. But you now have two regulators in your charging circuit, the internal and the external. I'm not sure what happens when you do that. Have you checked voltage at the battery with the engine running? The easiest way for you (wiring challenged) might be the MSA adapter in the link I sent. It just plugs in to the plug that connects to the external regulator. All of the "re-wiring" is internal to the plug and the diode is inside. I sent you the wrong link, this one has just the adapter - http://www.thezstore.com/page/TZS/PROD/SRC19/12-4067 Or you could get the right alternator for an external regulator (but check your regulator also). Here is a link that has the 240Z alternator swap described, with the diode part number. It's not too complicated if you want to save a few dollars or don't want to wait for the MSA adapter. The alternator swap is about halfway down the page, Part 7 - http://datsunzgarage.com/engine/ Quote Link to comment Share on other sites More sharing options...
jay28 Posted June 21, 2011 Author Share Posted June 21, 2011 Thank very much for your help. I just ordered the plug in diode in the link you sent me. I never checked voltage at the battery bit I assume it would have been very high? The battery wasn't great anyway so I'll be getting a new one when the diode arrives. Hopefully it will sort it. Thanks for the links I'll have a read through them all now Quote Link to comment Share on other sites More sharing options...
jay28 Posted June 21, 2011 Author Share Posted June 21, 2011 Well msa got back to me and said they don't have a plug in diode for the early 260z. Oh well Quote Link to comment Share on other sites More sharing options...
DCZ Posted June 21, 2011 Share Posted June 21, 2011 Search Hybridz for member HLS30-08077. I think he makes the plug(s) that MSA sells and should be able to hook you up. Quote Link to comment Share on other sites More sharing options...
jay28 Posted June 21, 2011 Author Share Posted June 21, 2011 Cheers for that I'll do that now Quote Link to comment Share on other sites More sharing options...
borini63 Posted June 25, 2011 Share Posted June 25, 2011 (edited) Cheers for that I'll do that now Are you still looking for the diode,I have one from 82 280ZX turbo and that the one that goes under the dash. I will ship it for $10 Edited June 25, 2011 by borini63 Quote Link to comment Share on other sites More sharing options...
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