Question about Mercury Cougar
Hello! The fuel pump relay normally open contacts receives +12 volts via fuse # 9...Opposite side ...Green/Orange wire passes through the closed contacts of the Inertia Switch and supplies +12 volts to Fuel Pump Module (Green/Orange)...The Fuel Pump Relay...Green/Blue wire is provided +12 volts via the ignition switch...This wire multiples to both the EVAP Canister Vent Valve and Purge Valve...The wire that you are asking about...Black/Blue Is one of two signals from the PCM that enable the pump...It is Pin #54 on the PCM connector...The Green/Black wire is the other...From Pin # 40 (PCM)...
Sensors communicate to the PCM which enable the fuel system...#1 Manifold Absolute Pressure sensor...#2 The Throttle Positioning Sensor (TPS)...These are the two most important...There are others...If you do not have +12 volts at The Green/Orange wire with the ignition on..FP Relay is defective...No signal from PCM possible sensor fault...Let me know ....Guru......Saailer
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Posted on Aug 31, 2010
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Posted on Jan 02, 2017
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