I HAVE THIS CAR AND AS OF RECENTLY, MY ENGINE CONTROL FUSE (10A) KEEPS BLOWING. AT THE MAJORITY OF TIMES IT HAPPENS WHEN I AM DRIVING (WHICH CAN BE VERY DANGEROUS ON THE HIGHWAY) THE RPMS JUST DROP AND THE CAR SHUTS OFF AS SOON AS IT BLOWS, AND OTHER TIMES IT HAS HAPPENED WHEN I AM STARTING THE CAR BUT RARELY SO. WHEN THE FUSE IS BLOWN I CNAT START THE CAR, THE CAR CRANKS BUT IT DOES NOT TURN OVER, WHEN I REPLACE THE FUSE IT STARTS AGAIN . AFTER THIS STARTED HAPPENNING I HAVE RECENTLY CHANGED THE SPARK PLUGS AND THE SPARK PLUG WIRES BUT I CANT FIGURE OUT WHAT IS WRONG. PLEASE HELP! PULLING MY HAIR OUT. THIS IS MY ONLY MODE OF TRANSPORTATION...
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Re: ENG CONT FUSE BLOWS CONSTANTLY
Check the wire harness to the ecm... which is located under the radio... if you , like I , live in a wet / snowy climate... the water /ice from your boots melts and collects near the harness. Maybe it corroded a wire and is causing it to short?
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Does your Grand Marquis have head lamps with auto lamps ? Which fuse keeps blowing ? Could be a shorted LCM - lighting control module ?
Lighting Control Module (LCM)
The LCM eliminates the electronic interference and heat associated with the thermoelectric devices used previously. The LCM is a microprocessor-based module that controls several vehicle subsystems. It responds to electrical input signals from various switches, sensors, and external modules..
YES you need them, ENG MTG is the Engine Management system, and the ENG CONT is the
Engine Control system so you see if they are disconnected you will have a good time wondering what is up with the car
You have a short somewhere in the starting and ignition systems. Take your car to an automotive electrical specialist immediately. If you put in a large enough fuse the car will start but you could trigger a fire that might destroy the car.
The fact that you've blown 2 fuses unrelated is odd. Have you been in a accident in the front lately? The most of the cars lately don't have a voltage regulator, it's in the ECM. So what goes on when the ign. fuse blows? Is there a different fuse for the ECM?
Fuses only blow if the load is heavier than it is designed for. Most likely causes are,
To small fuse.
If you have the correct fuse then somewhere in the wiring circuit is asking for too much. You need a good electrical tech to find out your cause. If it blows the fuse once a month then this can be a pain in the rear to find the cause. Most wiring is made very durable. Look for damaged areas, or where work has been performed in the past and wiring has been disturbed and not properly secured.
Look for alterations,
Hope that helps.
Hi Jeff , in what fuse box is this 10 amp ign. fuse located ? I am looking at a power distribution diagram and i see a IGN 3 10amp fuse located in the I/P fuse box ! Is this the fuse that blows ? I see where you replaced the 10 amp with a 30amp . That is never a good idea , you don't want to make your problems worst . Melt wiring harness , could start a fire . Do you know how to do electrical trouble shooting ? How to use a wiring diagram , power distribuition diagram ? That fuse is hot in the run , powers the rear Heat / A/C , automatic level relay, ESC - electronic suspension control module , rear wheel steering control module , Plus someother thing's depending which vehicle , Y91 - ULT . Your Taho doesn't have all this options . http://www.bbbind.com/free_tsb.html find the thing's that fuse powers , disconnect them one at a time till the problem goes away .
I'm sorry, but I am not really certain which fuse you are describing because the service manual only uses fuse NUMBERS to positively identify the fuses. There should be a fuse number map on the lid to your fuse block or the fuse block itself will have numbers on it.
With all of that said. An educated "guess" tells me that you are most likely talking about fuse #46. If you find this to be correct, the MOST LIKELY cause of your problem is a shorted injector. This is a very common problem with that engine. You will have to disconnect each of the injectors and check the resistance to determine which one is causing the fuse to blow. The front bank is very easy to check. If the problem is not found there, the intake plenum must be removed to get to the injectors on the rear bank.