<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>If the LED's light up the ground is correct. The pulsating is most likely caused by the regulator. Have someone hold the engine speed at 2,000 rpm's and see if the pulsating goes away.<br><br>Sent from my keyboard</div><div><br>On Aug 11, 2018, at 7:46 PM, Kevin Valentine via Spridgets <<a href="mailto:spridgets@autox.team.net">spridgets@autox.team.net</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Howard,<div><br></div><div>Is your car neg or pos ground?</div><div><br></div><div>Also - in some installations a ballast resistor is required for led lights.</div><div><br></div><div>Kevin V.</div><div>Tuscarora, Pa</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Aug 11, 2018 at 6:48 PM, Howard Collins via Spridgets <span dir="ltr"><<a href="mailto:spridgets@autox.team.net" target="_blank">spridgets@autox.team.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Friends,<br>
<br>
I just installed a pair of LED rear lights, purchased from Moss. With the engine off they look nice and bright, much more so than the standard fixtures they replaced, even with halogen bulbs. <br>
<br>
The issue I have with them is the fact that they pulsate when the engine is running, in both the tail light mode as well as the brake light mode. Not a little bit, but a whole bunch.<br>
<br>
Do you suppose the is because of a weak or erratic generator or voltage regulator? This was never the case with the previous lights.<br>
<br>
Any suggestions?<br>
<br>
Howard Collins<br>
<br>
Sent from my iPad<br>
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