<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr"> It was sent to USA with two horns. Home market might have had only one. Paul will know.</div><div dir="ltr"> The most frequent cause of horn weakness is defective grounding, followed by poor connections in power supply. </div><div dir="ltr"> Chase and check all the wires and connections. Horns draw a fierce current, so good connections are important. </div><div dir="ltr">Bob</div><div dir="ltr"><br></div><div dir="ltr"><br>On Aug 10, 2021, at 1:01 PM, Michael MacLean <<a href="mailto:springer.mike51@gmail.com">springer.mike51@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr"><div dir="ltr"><div>Speaking of horns, my 1969 MGB GT has only one horn. Is that original? It has two wires going to it. It works OK, but it just sounds weak. What is a good alternative? Can I wire two horns here?</div><div>Mike MacLean<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Aug 10, 2021 at 2:49 AM PaulHunt73 <<a href="mailto:paulhunt73@virginmedia.com">paulhunt73@virginmedia.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><u></u>
<div style="overflow-wrap: break-word;" bgcolor="#ffffff" lang="EN-US">
<div>The horn wiring changed on late model cars so that the stalk button puts
out 12v to the horns, and the horns only have one wire each as they pick up an
earth from their mountings.</div>
<div> </div>
<div>As such the horn push should have purple (12v, fused always live) and
purple/black (to the horn) wires. First thing to check is, does the
interior light work? If not maybe the purple supply from the fusebox has failed,
bottom fuse.</div>
<div> </div>
<div>If so, with it lit press the horn button. Does it go out? If so
then there is a bad connection back through the fusebox.</div>
<div> </div>
<div>Next it depends on whether it is easier for you to check the wiring at the
multi-plug by the column, or at the horns. In the former case look for the
purple and purple black wires and check them (connector still plugged together)
for 12v on the purple all the time, and on the purple/black when the button is
pushed. If on the purple but not the purple/black the switch or wiring in
the stalk is faulty. Sometimes the wires are moulded into the connector
blocks so you can only test by parting the connectors just enough to expose the
pins, but they are still making contact.</div>
<div> </div>
<div>At the horns with the button pressed you should have 12v on the
purple/black spades on the horns (wiring connected). If not and the
test at the column multi-plug was good then the circuit back to there is faulty,
most likely is a bad connection between the wiring connector and horn
spade.</div>
<div> </div>
<div>If you see 12v on the horn spade check a clean part of the horn body
for 12v as well. If you see that then the horn earthing is bad. If you saw
12v on the purple/black spade but not on the body then the horn is bad
internally.</div>
<div> </div>
<div>It might seem unlikely that the fault is at the horns in both cases, but
anything is possible.</div>
<div> </div>
<div>BTW stuff the trumpets with rags to avoid getting a loud blast if you
disturb the fault and one or other should suddenly start working :o)</div>
<div> </div>
<div>PaulH</div>
<blockquote style="border-left:2px solid rgb(0,0,0);padding-left:5px;padding-right:0px;margin-left:5px;margin-right:0px">
<div style="font:10pt arial">----- Original Message ----- </div>
<div><br></div>
<div class="gmail-m_-4576391806103799009WordSection1">
<p class="MsoNormal">We’re working on a 1980 B with a maddening assortment of
electrical problems. Right now we’re trying to figure out why the horn
push won’t work—and all the wiring diagrams (Bentley & Advance
Autowire)—show the horn as having purple wiring—apparently meant for the
horn push in the steering wheel button, not the push-in-the-wiper-stalk of
this car. Any advice from the List?</p></div></blockquote></div>
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</div></blockquote><blockquote type="cite"><div dir="ltr"><MG Horn1.jpg></div></blockquote><blockquote type="cite"><div dir="ltr"><MGB GT Waxed.jpg></div></blockquote><blockquote type="cite"><div dir="ltr"><span>_______________________________________________</span><br><span></span><br><span><a href="mailto:Mgs@autox.team.net">Mgs@autox.team.net</a></span><br><span>Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a></span><br><span>Suggested annual donation $12.75</span><br><span></span><br><span>Archive: <a href="http://www.team.net/pipermail/mgs">http://www.team.net/pipermail/mgs</a> <a href="http://autox.team.net/archive">http://autox.team.net/archive</a></span><br><span></span><br><span>Unsubscribe: <a href="http://autox.team.net/mailman/options/mgs/mgbobh@gmail.com">http://autox.team.net/mailman/options/mgs/mgbobh@gmail.com</a></span><br></div></blockquote></body></html>