Where does the high pressure fuel pump get it's fire from on a 1989 ford f150?

Asked by Mar 17, 2015 at 09:44 PM about the 1989 Ford F-150 STD Extended Cab 4WD SB

Question type: Maintenance & Repair

2 Answers

135

Behind the coolant/windshield washer reservoirs you will have 2 or 3 relays. EEC, Fuel pump relay & a Towing pkg. relay for trailer lights if truck came w/that option. My 89 F150's relays (2) had long been off the bracket and just laying on the fender well allowing the underside of both relays (where the connector plugs into) a steady diet of water. Fuel pump relay was corroded. Took relay out and jumped two wires w/a paper clip to get to a parts store for new relay. Which two ? That was 140,000 miles ago that I replaced both and zip tied them horizontally in their original location.

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135

Which two wires to bypass relay I don't know w/o looking at wiring diagram.

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