 ATTN alternator guru's |
 Sep 30, 2014 - 9:18 AM
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Enthusiast  Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%)  |
key on, engine not running i get a normal battery light, Start engine and the battery light dimms. Key on, engine not running i get 12V on pins 2 and 3 and 5V on pin 1 (lamp) looking at this diagram  I assume that the alternator provides a ground on pin 1 to turn on the lamp when the engine is off and 5V when the engine is running to turn the lamp off. With the engine running I put my volt meter on pin 1 of the alternator to ground and got something like 1.1V which makes sense why the light dims. -------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
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