<p><span class="h-card" translate="no"><a href="https://mastodon.social/@mcc" class="u-url mention">@<span>mcc</span></a></span> (Car electronics are weird. Everything works by running just the one wire for power, and using the frame as a common return/ground. That works because tires are made from conductive rubber, such that the frame is effectively grounded to the road.)</p>