{"id":59726,"date":"2020-03-14T06:43:15","date_gmt":"2020-03-14T13:43:15","guid":{"rendered":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/?p=59726"},"modified":"2020-03-14T06:43:17","modified_gmt":"2020-03-14T13:43:17","slug":"installed-battery-backwards-e28-518i-5-series-bmw-1986","status":"publish","type":"post","link":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2020\/03\/installed-battery-backwards-e28-518i-5-series-bmw-1986","title":{"rendered":"Installed battery backwards E28 518i 5 series BMW (1986)"},"content":{"rendered":"

\"1986-bmw-518\"<\/p>\n

Hello, instead of connecting the positive terminal of the battery<\/a> to the starter motor, I connected it to ground. At first I did not see any spark because the ground terminal was disconnected. But when i approached the ground wire to the battery negative terminal a spark appeared. After fixing my mistake, the fuel pump does not stop when the key is turned to “start” position and there is no crank<\/a>.<\/p>\n

What is the most common fault that it is expected to have from my mistake? Fried ECU? Fried starter? Bad ground connection? Thank you<\/p>\n

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Double check your connections and then make sure the battery is fully charged. Check the related fuses and relays. Sounds like the fuel pump relay is stuck on. I don’t think you harmed the starter. If you hurt anything it would be the battery.<\/p>\n","protected":false},"excerpt":{"rendered":"

Hello, instead of connecting the positive terminal of the battery to the starter motor, I connected it to ground. At first I did not see any spark because the ground terminal was disconnected. But when i approached the ground wire to the battery negative terminal a spark appeared. After fixing my mistake, the fuel pump… Read More »Installed battery backwards E28 518i 5 series BMW (1986)<\/span><\/a><\/p>\n","protected":false},"author":15627,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[1,156],"tags":[],"class_list":["post-59726","post","type-post","status-publish","format-standard","hentry","category-auto-repair-questions","category-bmw"],"_links":{"self":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/posts\/59726","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/users\/15627"}],"replies":[{"embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/comments?post=59726"}],"version-history":[{"count":0,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/posts\/59726\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/media?parent=59726"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/categories?post=59726"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/tags?post=59726"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}