{"id":76916,"date":"2020-12-31T11:02:59","date_gmt":"2020-12-31T19:02:59","guid":{"rendered":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/?p=76916"},"modified":"2024-02-11T08:18:07","modified_gmt":"2024-02-11T16:18:07","slug":"1989-s10-4x4-2-8-liter-wiring-diagrams","status":"publish","type":"post","link":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2020\/12\/1989-s10-4x4-2-8-liter-wiring-diagrams","title":{"rendered":"1989 s10 4\u00d74 2.8 liter wiring diagrams"},"content":{"rendered":"\n

put gas in throttle body will run, suddenly no headlights,no power to switch,all fuses is good,no power fuel pump relay, measure voltage fuel pump wires,5 volts, radio doesn’t illuminate just static,sure don’t have idea what it’s , everything worked,till I put transmission and transfer case back in the truck<\/p>\n\n\n\n

replaced transmission,transfer case,charged battery, then suddenly no headlights,radio static doesn’t illuminate,no power to fuel pump or relay,<\/p>\n\n\n\n

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I would think the first place to look would be the battery <\/a>connections. Make sure they are clean and secure. Then fully charge the battery before testing again. I have added a wiring diagrams below for reference. Check your Ground connections at both ends. This is an old vehicle so rust is your electrical systems worst enemy. As for the Fuel pump. It uses the ECM B fuse which is separate from the headlight fuse. So for both to have an issue at the same time I would look at the bigger connections such as the battery connections or cables. <\/p>\n\n\n\n

1989 Chevy S10 Headlight Wiring Diagram<\/h3>\n\n\n\n
\"1989-chevy-s10-headlights-wiring-diagram\"<\/a><\/figure>\n\n\n\n

1989 Chevy S10 2.8L Engine Wiring Diagram<\/h3>\n\n\n\n
\"1989-chevy-s10-fuel-pump-wiring-diagram\"<\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"

put gas in throttle body will run, suddenly no headlights,no power to switch,all fuses is good,no power fuel pump relay, measure voltage fuel pump wires,5 volts, radio doesn’t illuminate just static,sure don’t have idea what it’s , everything worked,till I put transmission and transfer case back in the truck replaced transmission,transfer case,charged battery, then suddenly… Read More »1989 s10 4\u00d74 2.8 liter wiring diagrams<\/span><\/a><\/p>\n","protected":false},"author":16338,"featured_media":76934,"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":[1,3],"tags":[9505],"class_list":["post-76916","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-auto-repair-questions","category-chevy","tag-s10"],"_links":{"self":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/posts\/76916","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\/16338"}],"replies":[{"embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/comments?post=76916"}],"version-history":[{"count":0,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/posts\/76916\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/media\/76934"}],"wp:attachment":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/media?parent=76916"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/categories?post=76916"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/tags?post=76916"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}