wiring diagram<\/a> for the Fuel Pump Relay. Black wire should be grounded. The Red\/Yellow wire should be battery positive when activated and will connect power from the Yellow wire and flow through the Pink\/Black wire to feed the fuel pump. If you are not seeing battery positive on the yellow wire, check the Inertia Switch.<\/p>\n![\"fuel](\"\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/08\/fuel-pump-relay-1986-ford-f-350-wiring-diagram.jpg\")
<\/p>\n
Two electric pumps are used on fuel<\/span> injected models; a low pressure boost pump<\/span> mounted in the fuel<\/span> tank and a high pressure pump<\/span> mounted on the vehicle frame. Some models equipped with the 8-460 (7.5L) carbureted engines use a single low pressure pump<\/span> mounted in the fuel<\/span> tank.<\/p>\nOn injected models the low pressure pump<\/span> is used to provide pressurized fuel<\/span> to the inlet of the high pressure pump<\/span> and helps prevent noise and heating problems. The externally mounted high pressure pump<\/span> is capable of supplying 15.9 gallons of fuel<\/span> an hour. System pressure is controlled by a pressure regulator mounted on the engine.<\/p>\nWith internal fuel<\/span> tank mounted pumps tank removal is required when servicing the pump<\/span>. Frame mounted models can be accessed from under the vehicle. Prior to servicing release system pressure (see Fuel<\/span> Supply Manifold details). Disconnect the negative battery cable prior to pump<\/span> removal.<\/p>\n","protected":false},"excerpt":{"rendered":"Can’t get power past fuel pump relay? RESPONSE Looking at the wiring diagram for the Fuel Pump Relay. Black wire should be grounded. The Red\/Yellow wire should be battery positive when activated and will connect power from the Yellow wire and flow through the Pink\/Black wire to feed the fuel pump. If you are not… Read More »Fuel Pump Relay 1986 F-350 7.5l<\/span><\/a><\/p>\n","protected":false},"author":13871,"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":[1,5],"tags":[10017,9568,10876],"class_list":["post-36036","post","type-post","status-publish","format-standard","hentry","category-auto-repair-questions","category-ford","tag-f-350","tag-fuel-pump-relay","tag-fuel-relay"],"yoast_head":"\nFuel Pump Relay 1986 F-350 7.5l - FreeAutoMechanic Advice<\/title>\n<meta name=\"description\" content=\"Can't get power past fuel pump relay? 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![\"1986](\"\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/08\/1986-ford-f350.jpg\")
Can’t get power past fuel pump relay?<\/p>\n