Question about Mercury Cougar

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  • ANDRES MELERO Aug 31, 2010


  • ANDRES MELERO Sep 01, 2010

    got yu, i will do that this wknd., in the mean time,please tell me the color code for the power wires going from the fuel delivery module to the pump coil., i want to eliminate the coil as a fault., this pump has been changed twice by a mechanic over the last two months, he also changed the fuel rail pressure sensor., first problem the car would stop after an hour driving and would start again after waiting one or two min..second.problem going uphill no power,third problem now the pump won't pump.,the mechanics two could not fix the problem.. andy



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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

I’m happy to help further over the phone at

Posted on Aug 31, 2010

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  • David Burbee
    David Burbee Aug 31, 2010

    Hello! The Fuel Pump Module contains the fuel pump...Pcm supplies ground to the fuel pump, which completes the circuit, from The Black/Blue and Green/black wires...If neither wire has a ground the Pcm isn't being told to fire the pump...I'm sending test procedures to eliminate the MAP and the TPS as a fault...I bet there isn't ground present on either of those two wires...Test them both and let me know...I'm on-line till 6PM EDT...I'll hang here and wait for you...Looking like a sensor fault...


  • David Burbee
    David Burbee Aug 31, 2010

    Hello! The TPS is bolted to the throttle body...It has a three wire connector...Wire colors are...White...Brown...Yellow...Using two safety pins...Push a pin into the rear of the in-place connector.into the White wire...The other into the Brown...Using a volt meter set to read 5 volts...Place the + probe on the White wire and the - probe on the Brown...Turn the key to on...Must read less than 1 volt (.85)...If not TPS is at fault...Move the White wire pin/probe to the Yellow wire...Key on...Must read +5 volts...If not TPS is defective....The V6 does not have a MAP sensor...It has a Fuel Rail Pressure sensor (FRP) ...It is bolted directly to the rail...Wire colors...White/Green...Yellow/Green...And Brown/Green...Use the same technique...Pin the white/Green and the Brown/Green... + meter to White/Green and - meter to Brown/Green...Record reading....Move + probe to Yellow/Green...Record reading....Send resulta...Saailer

  • David Burbee
    David Burbee Sep 01, 2010

    Hello! When a mechanic changes the same component twice within two months; Alarm bells go off...
    The pump wires are...White/Black...And Brown/Yellow...........The data is pointing at the PCM not firing the fuel pump due to a missing sensor input...Lose of power also (one of the original complaints) points at broken substrate on the Throttle Positioning Sensor...That sensor plays the role of Fuel Boss...
    Either the sensor is defective or a loose/broken connection to it...Take the time to eliminate the TPS...Key on... (.85) volts across the White and Brown wire...And +5 volts across the Yellow and Brown wire...And pray for me; I will soon have a hurricane in my face.............Saailer



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I'm getting codes p1884 p0700 and p2610. the car stopped then would barely move. made it home waited a few minutes and it ran fine

code p 0700 is TCM ( transmission control module) problem
code p2610 refers to EC< problem and fuel pump control module wiring short to ground , short to positive--fuel pump control module
code p1884 is vehicle specific so you will have to give the make and model of the vehicle
while you are at it , a description of the problem ( trouble getting home is not real good to get advice)

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The fuel pump is located in the fuel tank or do you mean the fuel pump speed control module?

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Fuel control module 2008 escalade and the fuel pump quit working.if I run a hot wire to it it will run but as soon as I remove the hot wire it quits

Ran a hot wire to what fuel pump or the control module ? Which of these is yours ?
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Figure 10: Fuel Pump Flow Control Module (Except LY6) Does yours have fuel pump flow control module under the vehicle Fuel Pump Flow Control Module (except LY6)
Mounted to the left side of the frame assembly below the driver seat ?
Fuel Pump Flow Control Module (FPCM) - LMF
The fuel pump flow control module (FPCM) is a serviceable GMLAN module. The FPCM receives the desired fuel pressure message from the engine control module (ECM) and controls the fuel pump located within the fuel tank to achieve the desired fuel pressure. The FPCM sends a 25 KHZ PWM signal to the fuel pump, and pump speed is changed by varying the duty cycle of this signal. Maximum current supplied to the fuel pump is 15 amps. A liquid fuel pressure sensor provides fuel pressure feedback to the FPCM.
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The electronic returnless fuel system is a microprocessor controlled fuel delivery system which transports fuel from the tank to the fuel rails. It functions as an electronic replacement for a traditional, mechanical fuel pressure regulator. A pressure vent valve within the fuel tank provides an added measure of fuel pump flow control module (FPCM). Desired fuel pressure is commanded by the engine control module (ECM), and transmitted to the FPCM via a GMLAN serial data message. A liquid fuel pressure sensor provides the feedback the FPCM requires for Closed Loop fuel pressure control.
If your vehicle has this system check it for DTC'S - diagnostic trouble codes . Will take guess work out of it .
DTC P0191: Fuel Rail Pressure (FRP) Sensor Performance
DTC P0192: Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage
DTC P0193: Fuel Rail Pressure (FRP) Sensor Circuit High Voltage
DTC P0230: Fuel Pump Relay Control Circuit
DTC P0231: Fuel Pump Control Circuit Low Voltage
DTC P0232: Fuel Pump Control Circuit High Voltage
DTC P023F: Fuel Pump Control Circuit
The engine control module (ECM) supplies voltage to the fuel pump flow control module (FPCM) when the ECM detects that the ignition is on. The voltage from the ECM to the FPCM remains active for 2 seconds, unless the engine is in crank or run. While this voltage is being received, the FPCM supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel rail pressure.
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1 Answer

Cougar fuel pump relay

there is a 30A fuse in the power line to the pump. Check for continuity, if the fuse is good check to see if there is 12v on the
relay input (black/yellow wire). If voltage is correct check the Mass air flow sensor operation ( you can find the procedure at the AutoZone web site in the repair manual section for your car). The MAF sensor sends the control voltage to the fuel pump relay, if that is good then the relay might be bad. If the CCRM was bad I believe it would produce a fault code. I hope this helps,

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1 Answer

Code p1237 on a 2002 mercury cougar

Code 1237 is for a problem with the fuel pump circuit.
There is a fuel pump driver module in the back of the car that handles voltage going to the pump.
The problem could be the computer, the module, the wiring to the pump, or the pump itself. Each component would need to be checked.

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1 Answer

I need to no about wirining on the right qauter panel for 1987 mercurey cougar thanks.

fuel pump controlled by a 20 amp fuse and relay.fuel pump is controlled by a inertia switch located under carpet left side trunk area.your alternator has a 175 amp mega fuse and a 15 amp fuse your dash control and speedometer has a 60 amp fuse going to control relay module.

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1 Answer

My fuel pump on my 99 cougar v6 only runs for a half second then shuts off I've replaced the filter , the pressure regulator valve , the pump and it still does the same thing . could I have a ecm prob

Generally, the computer only runs the pump long enough to start the engine and build oil pressure. After that, the oil pressure switch keeps the pump on, most of the time by supplying a ground to the fuel pump relay. This is a built in safety thing, when the engine isn't running, the fuel pump shuts off. Most public libraries have Chilton's manuals, or you could pick up a Hayne's manual at a store like Autozone. These books can help you locate the relay and oil pressure switch, as well as provide wire colors for your specific vehicle.

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1 Answer

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See page one at the pdf link below.

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1 Answer

2001 Mercury cougar fuel pump wiring

white/black stripe - from fuel pump module to fuel pump motor

brown/yellow stripe - same as above

black - fuel pump to ground

green/orange stripe - from fuel pump relay to inertia switch to fuel pump module

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