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I have been popping the hood and taking the battery cable off the post all summer to stop the fuel pump from continuously running and drawing my battery. This is a 1990 Bronco with a 5.0.
31 gru 2008 · 1. The ignition key is first placed in the ON position for about 2 or 3 seconds. This allows the fuel system to prime for start up. 2. Once the ECM sees engine speed via PIP signal above about 500 rpm... it will then ground the fuel pump relay to run the engine.
7 wrz 2009 · 1987 - 1996 F150 & Larger F-Series Trucks - 1987 Fuel Pump relay - I've been having electrical problems with the starter and relay. Now as I'm nearing getting them fixed, the engine won't fire. I think the fuel pumps aren't working and I may have fried something.
27 kwi 2017 · Since the low current wire on the fuel pump relay doesn't have power, trace the wire from the fuel pump relay to the eec relay and look for any fraying or broken spots. You may need to use a test light or multimeter to determine where the exact break is.
12 kwi 2018 · If the PIP signals fall below 120RPM, the control module cuts off the signal to the fuel pump relay or the integrated relay control module. The pump will also run when the terminals of the fuel pump test connector are jumped. the Control module signals the pump when it receives a CRANK signal, and when the Control module gets PIP signals that ...
1 lip 2016 · Start testing at the fuel pump relay. The relay must respond to the EEC processor and the relay contacts must be a low resistance path for fuel pump power. Relay testing can be done in a couple minutes with the fuel pump test table.
