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I have a 1995 sc300 with an oval alternator plug. Can anyone please confirm the order of the 3 plugs by color? I want to make sure my replacement plug is installed correctly.
If those wires are confused in any way, you will definitely notice it alright.. In any case, below is a connector pinout, Pin 1 is marked L on the alternator and has a Solid Yellow or Yellow - Green wire; Pin 2 is marked IG and has a Black - Yellow or Red - Blue wire; Pin 3 is marked S, and has a Solid White wire. Be careful with a White wire, those may get discolored, just like you can see in this thread, where I realized that my 1st and 3rd wires are different colors only when I took a picture of them.
If those wires are confused in any way, you will definitely notice it alright.. In any case, below is a connector pinout, Pin 1 is marked L on the alternator and has a Solid Yellow or Yellow - Green wire; Pin 2 is marked IG and has a Black - Yellow or Red - Blue wire; Pin 3 is marked S, and has a Solid White wire. Be careful with a White wire, those may get discolored, just like you can see in this thread, where I realized that my 1st and 3rd wires are different colors only when I took a picture of them.
Hope this helps and best of luck!
Hi @Arsenii Not trying to hijack the thread. But I'm converting my 1993 Circular 3-pin alternator plug to the oval 3-pin plug. I'm upgrading my alternator, which I believe will have the oval style socket. Do you think this diagram looks correct?
Below is a corrected Pinout, Round Connector is off of 1993 SC300, Oval Connector is off of 1995 LS400, even though the pinout should stay the same for each style of connector, regardless of the model it was meant for.
With that, I would still suggest testing each wire to see which is which using a Test Light to be completely sure. Connect one end of a Test Light to Ground, and use the other to test the wiring - Pin S is the Sense wire, it should have Constant 12V, Pin IG is the Ignition Power, it should have 12V only when Ignition Key is in the ON position, Pin L is what triggers the Battery Light on the Dash, connecting a Test Light to it will cause both Test and Dash Lights to come On at half brightness.
Again, I would really suggest using a Test Light instead of a Multimeter, the latter can trick you badly in a lot of ways as it doesn't place the load on the Circuit. You can find a Test Light at any hardware or parts store, you can make one out of any old working bulb as well.
05-04-21, 01:50 AM
