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Re: location of the BCM
I AS A FORD TECH IN A LOCAL DEALER FOR 20 YEARS, THERE IS NO MODULE CALLED A BCM IN YOUR CAR, GM CALLS IT A BCM OR BODY CONTROL MODULE, THE GEM AND GM BCM SERVE THE SAME FUNCTION, AND YES THE DOOR LOCKS RUN THROUGH THE GEM ON FORD'S, AND YES IT MAY BE ON THE ELECTRONICS TRY IN THE TRUNK, IT IS THE WINDSTAR THAT HAS IT ABOVE THE FUSE BOX, SORRY, BEEN A FEW YEARS SINCE I RETIRED. OH GEM STANDS FOR GENERIC ELECTRONIC MODULE
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Do you know anything about automotive electronic's ? The trunk release is controlled by electronic control modules . Having the vehicle check for DTC'S - diagnostic trouble code's should be the first step in the diagnostic procedure . Then reading how it work's !
Factory service repair info.
Rear Compartment Lid Release System Components
• Body control module (BCM)
• Remote control door lock receiver
• Interior rear compartment lid release switch
• Exterior rear compartment lid release switch
• Rear compartment lid release actuator
• Trunk release relay
Rear Compartment Lid Release Operation
The interior rear compartment lid release switch receives a signal from the driver door switch assembly (DDSA). When the interior rear compartment lid release switch is activated, the signal circuit is pulled to ground. The DDSA interprets this and sends a GMLAN serial data message to the body control module (BCM) requesting the rear compartment lid be released. The BCM responds by applying battery voltage to the trunk release relay control circuit which energizes the TRUNK RELES relay. The trunk release relay is supplied with battery voltage at all times. With the relay coil energized, the relay switch contacts close allowing battery voltage to flow to the rear compartment lid release actuator causing the rear compartment lid to release. The rear compartment lid release actuator is permanently grounded at G402.
The trunk release relay is located in the rear fuse box located under the back seat.
Can you open trunk with a key? If so, unplug the electrical for the trunk, till you can fix the problem. Then look up the wiring diagram for trunk release, check wiring circuits, something maybe shorted that connects with your door. I haven't looked to see if bcm has a connection with doors as well as trunk release? The bcm was just a thought may not be relevant?
Are you talking about the module for the central locking system, alarm a delayed lights ? There really isn't a BCM that controls everything like in the newer vehicles. That's about the only one I can think of for body control functions other than the module for a sun roof. If this is the what you are looking for, this module is located in the trunk of the vehicle on the right (passenger) side behind the trim. Hope this helped you.
First, if you would like to receive USEFUL information about your vehicle, (ESPECIALLY when you are asking about engine controls) it would be nice if you would mention WHICH ENGINE your vehicle is equipped with!
1995 Mercury Cougar XR7 was equipped with 3 different engines: 3.8L NON-SC VIN CODE  3.8L SC VIN CODE [R] 4.6L V-8 VIN CODE [W]
The crank sensor for both of the 3.8L engines is located at the lower right FRONT of the engine.
The crank sensor for the 4.6L engine is located at the lower right REAR of the engine.
there are ussually rubber plugs in the bottom,if not use shop vac to remove water and fix leak check antenna if its metal and at the rear panel,other areas to check are the rear tail light gaskets.also look at tail mounting holes.