Electrical Question #15 Need Help Please, I'm totally stumped this time |
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Electrical Question #15 Need Help Please, I'm totally stumped this time |
76-914 |
Apr 6 2014, 06:33 PM
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#41
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,509 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California |
I'm going to have several electrical questions. 1st, Is pin #8, on the 14 pin plug at the relay board, the only switched 12v+ source in the engine compartment? TIA, Kent
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Mike Bellis |
May 2 2014, 11:40 PM
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#42
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
The alternator lamp work with 2 positive leads. One is switched from the key, through a fuse and to the lamp. The other is the D+ from the alternator. When the alternator spins and creates voltage (2nd positive) the dash lamp turns off. When the engine is not running, the D+ turns "less positive" and the lamp lights up.
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