94 FORD EXPLORER FUEL PUMP REPLACEMENT INSTALL

If battery is disconnected, vehicle computer and memory systems may lose memory data. 3) Check For Open Between SIG RTN & PWR GND Circuits At PCM With breakout box installed Application Wire Color 4.0L Black/Light Green CAUTION: Disconnecting vehicle battery will erase stored operating information from Keep-Alive Memory (KAM). If both readings are less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in PWR GND circuit, and repeat QUICK TEST. 40 and 60 at breakout box and negative battery terminal.

94 FORD EXPLORER FUEL PUMP REPLACEMENT INSTALL

Install Breakout Box (T83L-50-EEC-IV), leaving PCM connected. Inspect connector pins and repair if necessary. 2) Check Continuity Of PWR GND Circuit Turn ignition off. If voltage is 10.5 volts or more, go to next step. If voltage is less than 10.5 volts, recharge or replace battery. 40 & 60 (PWR GND) WIRE COLOR ID 1) Battery Voltage Check Turn ignition on (engine off). 11: Power Relay Circuit ID (B4) TEST PIN NO. To prevent replacement of good components, be aware the following non-EEC related areas and components may be cause of problem: Ã Battery cables and ground straps. Ã Wiring harness circuits (SIG RTN, PWR GND, VPWR, KAPWR and VREF). This test is only intended to diagnose: Ã Power Control Module (PCM). Unplug TPS, turn key on you should get 4-6 volts.ĬIRCUIT TEST B - CHECKING VEHICLE BATTERY Diagnostic Aids Enter this CIRCUIT TEST only when directed by CIRCUIT TEST C, CIRCUIT TEST J, CIRCUIT TEST PA, CIRCUIT TEST PB or CIRCUIT TEST PC. Check fuse in the power distribution center, and power relay.

94 ford explorer fuel pump replacement