Why does your grand marquis keep blowing the powertrain control module fuse?
You have a short that is blowing the fuse, it may not be in the module itself but in a wire or sensor that leads to it.
Short to ground, somewhere.
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Answer . uh, i believe it is called a short somewhere.
If you are asking for a 1996 or newer model year, it is located just below the dash on the driver's side above the OBDII port. It is not hard to access. Drop the lower dash pa…nel for light access and uncouple the harness clips. Slip it back and replace with the new one.
The pcm is the computer that controls all of the engine functions and sometimes the transmission. In a vehicle, the term drivetrain or powertrain refers to the group of com…ponents that generate power and deliver it to the road surface, water, or air. This includes the engine, transmission, driveshafts, differentials, and the final drive (drive wheels, caterpillar track, propeller, etc). Sometimes "powertrain" is used to refer to simply the engine and transmission, including the other components only if they are integral to the transmission. A vehicle's driveline consists of the parts of the drivetrain excluding the engine and transmission. It is the portion of a vehicle, after the transmission, that changes depending on whether a vehicle is front wheel drive, four wheel drive, or rear wheel drive.
Answer . Check the horn - if it doesn't blow, then you may have found the culprit. In most cars, the lighter and horn are on the same circuit.
In a vehicle, the term drivetrain or powertrain refers to the group of components that generate power and deliver it to the road surface, water, or air. This includes the engi…ne, transmission, driveshafts, differentials, and the final drive (drive wheels, caterpillar track, propeller, etc). Sometimes "powertrain" is used to refer to simply the engine and transmission, including the other components only if they are integral to the transmission. A vehicle's driveline consists of the parts of the drivetrain excluding the engine and transmission. It is the portion of a vehicle, after the transmission, that changes depending on whether a vehicle is front wheel drive, four wheel drive, or rear wheel drive. In a wider sense, the powertrain includes all components to transform chemical, physical or nuclear energy into secondary energy and deliver it to the interface to the outer world for propulsion purposes. This includes the utilisation of multiple power sources and non wheel based vehicles. From an energetic standpoint the weakest point is the first step: internal combustion engines have limitations regarding efficiency, but the "well to wheel" efficiency of alternative propulsion systems are not considered any better. This refers to fuel cells with additional reformer losses, electric vehicles powered from the grid with low hydraulic energy share and also vehicles using energy storage with high losses (some battery types, ultra- or supercaps).  Developments Powertrain development for diesel engines involves the following trends: modular injection, electronic valve control (EVC), low pressure exhaust gas recirculation (EGR), and advanced combustion. Spark ignition technology has focused on de-throttling (in part load where the low efficiency of Otto engines is defined) and downsizing (lower displacement, EVC). Attention to new fuel qualities (no sulphur and aromates) allow new combustion concepts. These promise to combine clean combustion with high efficiency. So-called "combined combustion systems" (CCV) (Volkswagen, 2003) or "diesotto" cycles (Mercedes-Benz) are based on synthetic fuels (synthetic diesel, biomass to liquid (BTL) or gas to liquid (GTL)). The energy management inside the powertrain decoupling energy transformation and propulsion demand is in its infancy, especially in Europe. If acceleration is adapted automatically to follow minimal energy consumption and minimal environmental pollution, performance may suffer. The motor vehicle industry doubts that customers may adopt vehicles in which acceleration responsiveness is reduced. This type of riding has been called "de-emotionalization"
It is located under the drivers side of the dash, beneath and to the right of the steering column. Its a little black box, on my car it has the original sticker with a bar cod…e, part number and "lighting control" written on it. hope that helped!
for hazard fuses check all the bulbs in all the turn signals/running lights. Next check for flashers, they are usually located with the relays on the vehicle, and on fords are… typically round cylindrical thing that is about the size of a quarter If you are having trouble finding them turn on your turn signals and listen around your relays for something clicking with the lights. http://grote.com/product.php?product_number=44310 one trick i have learned is that you can swap the flashers around if there are more than one, and if that makes your hazards work but one of your blinkers not work then you know you just need one of them. they are cheap and do go out relatively often. if nothing else works i would check wiring harnesses and the hazard switch. hope my long winded answer can help.
usually a broken wire causing a dead short(grounding out to the cars body on a power wire) remove the rear tail light housings and check to make sure that one of the wires is… not crimped by the housing (this happens alot on these cars if it simple repair the wire and make sure not to crimp it when re installing the housing if it's not at the housing you'll need to check the wire all the way from the front to the back (this requires removing the seats and the carpet ) your looking for any spots that are showing bare wire and in some cases flat spots on the wire (it's a common problem because the wiring harness doesn't clear the tail lamp assembly when changing blown bulbs and more often then not the wires get crimped
Behind metal plate on lower dash right above where your right knee would be when sitting in drivers seat
GO to eBay > eBay Motors > place search : For "2004 mercury Grand Marquis Lighting Control Module" , Bunch of listings show up , choose the Lighting Control Module picture tha…t is in WHITE NEW BOX , full instruction ,Where is located ?, step by step removal instruction is all there. The company is ELECTRONICS REMANUFACTURING SERVICE.
Driver's side quarter panel in the engine compartment.
It is located above the gas pedal ((about 8") under the dash ,3 connectors from engine side plugs into the module ,the module white sticker part number can be read at the back… end of module the number usually starts with 5w...............,that is the module.
In Mercury Grand Marquis
Have to first remove all the light bulbs, then put in a fresh fuse, if it still blows, then you will have to follow all the wires to find the short. If the fuse does not blow,… then the problem is with either the bulb or the socket.
In Car Computers and Sensors
Under the hood. Driver side. On the fire wall there are two bolts attached to it. The actual module is under the dash but you cannot get it out without undoing those bolts und…er the hood. There is a large cylinder device in the way with 3 bolts. Remove that. It makes it allot easier. There is also a harness plugged into the brain and a bolt that holds it in. So you have to undo it to get the harness off. Once you do those steps. Go under the dash and you will see the silver box. Wiggle it around Untill you get it out. Then reverse these steps. You have a new brain! When putting a new brain in you need to ensure that it has correct software version for your vehicle. This is done at the dealer using the VIN of your vehicle. If the wrong version is installed the car or truck will not run right.
In Mercury Grand Marquis
It is that long chrome stick on the right side of the steering column. It does not have an electronic transmission so there isn't a controller it's all mechanical
In Car Fuses and Wiring
Circuit is overloaded, short in wiring, or you are using too small a fuse. Use the correct size fuse and do not go too big or too small.
In Car Fuses and Wiring
Short in the circuit, the circuit is overloaded, or you are installing too small a fuse.