[Shotimes] Fluctuating 12V power supply.

[Michael]

 Trying one more time....

I'm not an expert on car electronics, but I'm pretty sure something is wrong in my cars power supply circuit. As I understand it, the voltage supplied to, say, the headlights, is supposed to be 12V constant. And it is the voltage regulator in the alternator that keeps the voltage constant.

In my car however the voltage supply is always about 1V below the battery voltage. Thus, the headlights and other components frequently see voltage levels greater than 12V when the engine RPMs increase. And they see less than 12V when the car is idling. This is not good. 

I have debugged the problem and found that the input to the voltage regulator is floating. It's supposed to "see" the output voltage of the alternator, but it doesn't since there's an open circuit on terminal A of the voltage regulator. According to Helms I'm supposed to "Service Fuse Link F". Makes sense that the fuse may have blown, right?

The only thing is I'm not sure where Fuse Link F is. I have the EVTM which shows the vicinity of where Fuse Link F is supposed to be. And I think I found it (since one of the wires has the same color as the A terminal on the alternators regulator connector).

However, when I disconnect this connector, I don't see any fuse. Can someone help?


---Michael


94MTX,green,BOS+ --- On Fri 01/03, Michael  wrote:From: Michael [mailto: molsen@excite.com]To: shotimes@autox.team.netDate: Fri,  3 Jan 2003 11:31:44 -0500 (EST)Subject: [Shotimes] (no subject) I'm not an expert on car electronics, but I'm pretty sure something is wrong in my cars power supply circuit. As I understand it, the voltage supplied to, say, the headlights, is supposed to be 12V constant. And it is the voltage regulator in the alternator that keeps the voltage constant.In my car however the voltage supply is always about 1V below the battery voltage. Thus, the headlights and other components frequently see voltage levels greater than 12V when the engine RPMs increase. And they see Join Excite! - http://www.excite.comThe most personalized portal on the Web!_______________________________________________Shotimes mailing listShotimes@autox.team.nethttp://www.team.net/mailman/listinfo/shotimes

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