johny Posted July 21 Report Share Posted July 21 If no change Im wondering if theres a problem with the alternator. In that link they say terminal L should be down to earth with ignition on but not running so the ignition light will be illuminated and then when started 12v will appear on that terminal so stopping the bulb current... Link to comment Share on other sites More sharing options...
johny Posted July 21 Report Share Posted July 21 I know it worked before but I feel sure that was by luck rather than having it wired correctly. Now I think the only conclusion left is that theres a problem in the electronics.. Link to comment Share on other sites More sharing options...
Paul H Posted July 21 Author Report Share Posted July 21 To get things moving I’ll carry on as is though restore the brown to battery . I can monitor using volt meter as the light not work . If you fit your Denso and find the correct layout I’ll upgrade my wiring . All the best and thanks for your time & patience Paul Link to comment Share on other sites More sharing options...
johny Posted July 21 Report Share Posted July 21 To be honest I'll now make sure I definitely get the two pin version so that I dont have to worry about the sensing or other use of that third terminal😁 Link to comment Share on other sites More sharing options...
Paul H Posted July 22 Author Report Share Posted July 22 17 hours ago, johny said: I know it worked before but I feel sure that was by luck rather than having it wired correctly. Now I think the only conclusion left is that theres a problem in the electronics.. Re electronics - is that in the regulator ? Might be worth me getting a replacement Paul Link to comment Share on other sites More sharing options...
johny Posted July 22 Report Share Posted July 22 Have you tested it as in that article Paul? Terminal L must go down to earth when youd expect the ignition light to illuminate... Link to comment Share on other sites More sharing options...
Paul H Posted July 22 Author Report Share Posted July 22 2 minutes ago, johny said: Have you tested it as in that article Paul? Terminal L must go down to earth when youd expect the ignition light to illuminate... With my limited knowledge the only way would be to introduce a relay which earthes terminal L when the key is operated Paul Link to comment Share on other sites More sharing options...
johny Posted July 22 Report Share Posted July 22 ha no if the alternator regulator is good it should earth terminal L when its turned on by the ignition switch supply to terminal IGN plus it seems no supply being connected to terminal P... Link to comment Share on other sites More sharing options...
Paul H Posted July 22 Author Report Share Posted July 22 4 minutes ago, johny said: ha no if the alternator regulator is good it should earth terminal L when its turned on by the ignition switch supply to terminal IGN plus it seems no supply being connected to terminal P... Got it 👍. A replacement regulator “might” fix the issue ? Paul Link to comment Share on other sites More sharing options...
johny Posted July 22 Report Share Posted July 22 well step by step but certainly looks like terminal P shouldnt have had a 12v supply on it☹️ Link to comment Share on other sites More sharing options...
Paul H Posted July 22 Author Report Share Posted July 22 1 hour ago, johny said: well step by step but certainly looks like terminal P shouldnt have had a 12v supply on it☹️ Bit lost Terminal P ? Where is that Paul Link to comment Share on other sites More sharing options...
johny Posted July 22 Report Share Posted July 22 Come on Paul keep up🤣Your photo of the diagram shows it to be the left of the three pins! Believe you had a brown wire on it connected directly to the battery but its meant for supplying a pulsed signal to a tachometer if required... Link to comment Share on other sites More sharing options...
johny Posted July 22 Report Share Posted July 22 Heres the list. If it was an S terminal then the connection to battery would have been correct. As it is yours senses the correct voltage internally... Link to comment Share on other sites More sharing options...
Paul H Posted July 22 Author Report Share Posted July 22 Sorry I thought that was Sense which goes back to positive and tells the alternator what charge is required Paul Link to comment Share on other sites More sharing options...
johny Posted July 22 Report Share Posted July 22 yes its an easy mistake to make and I probably would have done the same but it looks like alternators have different configurations. From that list an S indicates battery sense but as I say that model of alternator also comes in a two pin version which are just L and IG... Link to comment Share on other sites More sharing options...
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