Caravan with Xmas tree tail lights | Electronics Forum (Circuits, Projects and Microcontrollers)

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Registration is free. <a href="/register">Click here to register now</a>. </div> </li> </ul> <center><div id='div-gpt-eto-header'> <script> googletag.cmd.push(function() { googletag.display('div-gpt-eto-header'); }); </script> </div></center> <div class="p-breadcrumbs--parent "> <ul class="p-breadcrumbs " itemscope itemtype="https://schema.org/BreadcrumbList"> <li itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"> <a href="/#electronics-categories.21" itemprop="item"> <span itemprop="name">Electronics Categories</span> </a> <meta itemprop="position" content="1" /> </li> <li itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"> <a href="/forums/automotive-electronics/" itemprop="item"> <span itemprop="name">Automotive Electronics</span> </a> <meta itemprop="position" content="2" /> </li> </ul> </div> <noscript class="js-jsWarning"><div class="blockMessage blockMessage--important blockMessage--iconic u-noJsOnly">JavaScript is disabled. 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It may not display this or other websites correctly.<br />You should upgrade or use an <a href="https://www.google.com/chrome/" target="_blank" rel="noopener">alternative browser</a>.</div> <div class="p-body-header"> <div class="p-title "> <h1 class="p-title-value">Caravan with Xmas tree tail lights</h1> </div> <div class="p-description"> <ul class="listInline listInline--bullet"> <li> <i class="fa--xf fal fa-user" aria-hidden="true" title="Thread starter"></i> <span class="u-srOnly">Thread starter</span> <a href="/members/fyretoy.329981/" class="username u-concealed" dir="auto" data-user-id="329981" data-xf-init="member-tooltip">fyretoy</a> </li> <li> <i class="fa--xf fal fa-clock" aria-hidden="true" title="Start date"></i> <span class="u-srOnly">Start date</span> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/" class="u-concealed"><time class="u-dt" dir="auto" datetime="2025-02-24T13:55:57-0800" data-time="1740434157" data-date-string="Feb 24, 2025" data-time-string="1:55 PM" title="Feb 24, 2025 at 1:55 PM">Yesterday at 1:55 PM</time></a> </li> </ul> </div> </div> <div class="p-body-main p-body-main--withSidebar "> <div class="p-body-contentCol"></div> <div class="p-body-sidebarCol"></div> <div class="p-body-content"> <div class="p-body-pageContent"> <div class="block block--messages " data-xf-init="lightbox select-to-quote" data-message-selector=".js-post" data-lb-id="thread-167392"> <div class="block-outer"></div> <div class="block-outer js-threadStatusField"></div> <div class="block-container"> <div class="block-body"> <article class="message message--post js-post js-inlineModContainer " data-author="fyretoy" data-content="post-1461164" id="js-post-1461164" > <span class="u-anchorTarget" id="post-1461164"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" > <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/fyretoy.329981/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="329981" data-xf-init="member-tooltip" style="background-color: #cc6666; color: #602020"> <span class="avatar-u329981-m" role="img" aria-label="fyretoy">F</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/fyretoy.329981/" class="username " dir="auto" data-user-id="329981" data-xf-init="member-tooltip">fyretoy</a></h4> <h5 class="userTitle message-userTitle" dir="auto">New Member</h5> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461164" rel="nofollow" > <time class="u-dt" dir="auto" datetime="2025-02-24T13:55:57-0800" data-time="1740434157" data-date-string="Feb 24, 2025" data-time-string="1:55 PM" title="Feb 24, 2025 at 1:55 PM">Yesterday at 1:55 PM</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461164" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1461164/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461164" rel="nofollow"> #1 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1461164" data-lb-caption-desc="fyretoy · Feb 24, 2025 at 1:55 PM"> <article class="message-body js-selectToQuote"> <div > <div class="bbWrapper">Hi, <br /> <br /> Having some trouble with my caravan tail lights.. all of which work perfectly on their own, indicators, brakes, park no problem but if i run 2 or more at the same time like indicators and park lights or indicators and brake lights all the bulbs flash like Xmas tree lights, if i run park lights then hit the brakes the park lights go very dim, Does this point to a specific issue or could be a bunch of things?</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> </div> </div> </div> <div class="block block--messages" data-xf-init="" data-type="post" data-href="/inline-mod/" data-search-target="*"> <span class="u-anchorTarget" id="posts"></span> <div class="block-outer"><div class="block-outer-opposite"> <div class="tabs tabs--standalone tabs--standalone--small tabs--standalone--inline"> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/" class="tabs-tab is-active" rel="nofollow"> Sort by date </a> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/?order=vote_score" class="tabs-tab " rel="nofollow"> Sort by votes </a> </div> </div></div> <div class="block-container lbContainer" data-xf-init="lightbox select-to-quote" data-message-selector=".js-post" data-lb-id="thread-167392" data-lb-universal="0"> <div class="block-body js-replyNewMessageContainer"> <article class="message message--post js-post js-inlineModContainer " data-author="alec_t" data-content="post-1461168" id="js-post-1461168" itemscope itemtype="https://schema.org/Answer" itemid="https://www.electro-tech-online.com/posts/1461168/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/caravan-with-xmas-tree-tail-lights.167392/" /> <span class="u-anchorTarget" id="post-1461168"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/alec_t.166711/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/alec_t.166711/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/alec_t.166711/" class="avatar avatar--m" data-user-id="166711" data-xf-init="member-tooltip"> <img src="/data/avatars/m/166/166711.jpg?1387730978" alt="alec_t" class="avatar-u166711-m" width="96" height="96" loading="lazy" itemprop="image" /> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/alec_t.166711/" class="username " dir="auto" data-user-id="166711" data-xf-init="member-tooltip"><span itemprop="name">alec_t</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461168" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2025-02-24T14:34:34-0800" data-time="1740436474" data-date-string="Feb 24, 2025" data-time-string="2:34 PM" title="Feb 24, 2025 at 2:34 PM" itemprop="datePublished">Yesterday at 2:34 PM</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461168" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1461168/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461168" rel="nofollow"> #2 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1461168" data-lb-caption-desc="alec_t · Feb 24, 2025 at 2:34 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">I'd guess there's at least one poor earth (chassis) connection.<br /> Welcome to ETO!</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper">My circuit designs should be regarded as experimental. Although they work in simulation, their component values may need altering or additional components may be necessary when the circuits are built. Due safety precautions should be taken with any circuit involving mains voltage or electrostatic-sensitive components.<br /> Alec's First Law:-<br /> Every problem has a solution (given the right information and resources).</div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList is-active"> <ul class="reactionSummary"> <li><span class="reaction reaction--small reaction--1" data-reaction-id="1"><i aria-hidden="true"></i><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="reaction-sprite js-reaction" alt="Like" title="Like" /></span></li> </ul> <span class="u-srOnly">Reactions:</span> <a class="reactionsBar-link" href="/posts/1461168/reactions" data-xf-click="overlay" data-cache="false" rel="nofollow"><bdi>Diver300</bdi></a> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> <div class="message-cell message-cell--vote"> <div class="message-column"> <div class="contentVote js-contentVote " data-xf-init="content-vote" data-content-id="post-1461168"> <meta itemprop="upvoteCount" content="0" /> <a href="javascript:" class="contentVote-vote is-disabled contentVote-vote--up " data-vote="up"><span class="u-srOnly">Upvote</span></a> <span class="contentVote-score js-voteCount" data-score="0">0</span> <a href="javascript:" class="contentVote-vote is-disabled contentVote-vote--down " data-vote="down"><span class="u-srOnly">Downvote</span></a> </div> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="Diver300" data-content="post-1461169" id="js-post-1461169" itemscope itemtype="https://schema.org/Answer" itemid="https://www.electro-tech-online.com/posts/1461169/"> <meta itemprop="parentItem" itemscope itemid="https://www.electro-tech-online.com/threads/caravan-with-xmas-tree-tail-lights.167392/" /> <span class="u-anchorTarget" id="post-1461169"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.electro-tech-online.com/members/diver300.73824/"> <meta itemprop="url" content="https://www.electro-tech-online.com/members/diver300.73824/" /> <div class="message-avatar message-avatar--online"> <div class="message-avatar-wrapper"> <a href="/members/diver300.73824/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="73824" data-xf-init="member-tooltip" style="background-color: #9933cc; color: #e0c2f0"> <span class="avatar-u73824-m" role="img" aria-label="Diver300">D</span> </a> <span class="message-avatar-online" tabindex="0" data-xf-init="tooltip" data-trigger="auto" title="Online now"></span> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/diver300.73824/" class="username " dir="auto" data-user-id="73824" data-xf-init="member-tooltip"><span itemprop="name">Diver300</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Well-Known Member</h5> <div class="userBanner userBanner userBanner--gray message-userBanner" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Most Helpful Member</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461169" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2025-02-24T15:25:38-0800" data-time="1740439538" data-date-string="Feb 24, 2025" data-time-string="3:25 PM" title="Feb 24, 2025 at 3:25 PM" itemprop="datePublished">Yesterday at 3:25 PM</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461169" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1461169/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461169" rel="nofollow"> #3 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1461169" data-lb-caption-desc="Diver300 · Feb 24, 2025 at 3:25 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">Caravans rarely connect the chassis to the electrical ground, so there has to be a ground wire running all the way from the trailer plug to the lights. That should be a thicker wire, but that is not always done.<br /> <br /> The Australian and New Zealand towing socket is a 12 way socket, which is a row of 7 and a row of 5. Some trailers only plug into the row of 7. The middle of each row is earth, and it's possible that the earth on the vehicle socket is poor or non-existent on one of the rows but OK on the other.<br /> <br /> A poor earth is very common on trailers. On some Jaguars and Land Rovers there is a trailer light test, that allows someone to check if all the lights work (and at the right time) as it lights up each light in turn, along with the corresponding light on the car. The system also turns on all of the lights at the same time, and that is done mainly to see if there is a faulty earth.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <aside class="message-signature"> <div class="bbWrapper"><a href="http://twitter.com/mtrak_uk" target="_blank" class="link link--external" rel="nofollow ugc noopener">http://twitter.com/mtrak_uk</a></div> </aside> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> <div class="message-cell message-cell--vote"> <div class="message-column"> <div class="contentVote js-contentVote " 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class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461185" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2025-02-25T08:07:51-0800" data-time="1740499671" data-date-string="Feb 25, 2025" data-time-string="8:07 AM" title="Feb 25, 2025 at 8:07 AM" itemprop="datePublished">Today at 8:07 AM</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461185" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1461185/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/caravan-with-xmas-tree-tail-lights.167392/post-1461185" rel="nofollow"> #4 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1461185" data-lb-caption-desc="ahsrabrifat · Feb 25, 2025 at 8:07 AM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">Set your multimeter to continuity mode and check between the tail light ground and the caravan chassis.<br /> There should be almost zero resistance (if resistance is high, the ground is bad).<br /> Also, test for voltage drops when lights are on.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" 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That should be a thicker wire, but that is not always done.\n\nThe Australian and New Zealand towing socket is a 12 way socket, which is a row of 7 and a row of 5. Some trailers only plug into the row of 7. The middle of each row is earth, and it's possible that the earth on the vehicle socket is poor or non-existent on one of the rows but OK on the other.\n\nA poor earth is very common on trailers. On some Jaguars and Land Rovers there is a trailer light test, that allows someone to check if all the lights work (and at the right time) as it lights up each light in turn, along with the corresponding light on the car. The system also turns on all of the lights at the same time, and that is done mainly to see if there is a faulty earth.", "upvoteCount": 0, "author": { "@type": "Person", "@id": "https://www.electro-tech-online.com/members/diver300.73824/", "name": "Diver300", "url": "https://www.electro-tech-online.com/members/diver300.73824/" } }, { "@type": "Answer", "datePublished": "2025-02-24T22:34:34+00:00", "url": "https://www.electro-tech-online.com/posts/1461168/", "text": "I'd guess there's at least one poor earth (chassis) connection.\nWelcome to ETO!", "upvoteCount": 0, "author": { "@type": "Person", "@id": "https://www.electro-tech-online.com/members/alec_t.166711/", "name": "alec_t", "url": "https://www.electro-tech-online.com/members/alec_t.166711/" } } ] }, "publisher": { "@type": "Organization", "name": "Electronics Forum (Circuits, Projects and Microcontrollers)", "description": "An electronics forum to talk all about circuits and projects.", "url": "https://www.electro-tech-online.com" } } </script>  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-MMC9PJ9" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>   <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-KLX5R59" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>  <script> $(function(){ var notice = $('.xb-welcome-notice'); if(notice.length){ var cookie = XF.Cookie.get('hide_welcome_notice'); if(!cookie){ XF.Cookie.set('hide_welcome_notice', Date.now()); notice.show(); } else if ((Date.now() - cookie) > 8.64e+7){ XF.Cookie.set('hide_welcome_notice', Date.now()); notice.show(); } else { notice.hide(); } } }); </script> </div> </body> </html>

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Caravan with Xmas tree tail lights | Electronics Forum (Circuits, Projects and Microcontrollers)