Alternator w/internal regulator test question? | 356 Speedster, 550 Spyder, Replica, Automotive Community

drallen

I searched the forum, but didn't find the answer: With the key on, should the D+ terminal ( regulator terminal on the alternator ) be live/testable with a test light? My charging system died - voltmeter accross the battery is only 12 or so volts with the engine running - no other issues...dash ignition light is on until I start the engine and then it goes out ( bulb is good - no other wiring issues ) which would seem to indicate a good charging system, but the battery definitely isn't getting charged ( still showing 12 volts when the engine is running and blipped to excite the regulator...

Ideas?

Doug

9/17/121:22 PM

Original Post

Replies sorted oldest to newest

Jim Kelly2013 SAS coupe-Fiji

Absent a connection problem, if your voltmeter isn't seeing an increase in voltage at the battery with the engine running, your alternator is likely not putting out. An auto electric shop can tell quickly if you don't want to pull the alternator yourself.

LeonChupp

Pep Boys, AutoZone,O'rieleys....all will diagnose this problem for free.... You just have to get the car there...

<div id="{%=id%}" class="reveal-modal small h-alert-modal-popup" data-reveal>
    <div class="first-modal-focus focus-utility-element" tabindex="0" aria-label="Inside Modal"></div>

<h4 id="{%=id%}_title" class="margin-bottom-10 popup-title"></h4>
    <div id="{%=id%}_body" class="margin-bottom-10 popup-body">
        </div>

<ul id="{%=id%}ButtonGroup" class="button-group h-popup-buttons even-button-group even-1">
    <li id="{%=id%}Okay_buttonContainer"><a id="{%=id%}Okay" href="javascript:void(0);" class="button success no-margin-bottom h-alert-modal-ok-button" role="button">OK</a><script type="text/javascript">
        (function() {
            function {%=id%}Okay_click(event, data) {
            {%=id%}Popup.hide();
        }
        
                $('#{%=id%}Okay').on('click', {%=id%}Okay_click);
        })();
    </script></li></ul><a href="javascript:void(0);" class="close-reveal-modal" aria-label="Close Modal">&#215;</a><div class="last-modal-focus focus-utility-element" tabindex="0"></div>
</div>
<script type="text/javascript">
        (function() {
            {%=id%}Popup = new SS.Popup.ModalPopup('{%=id%}');
        })();
    </script>