20 Most Recent 1977 Mercury Grand Marquis Questions & Answers

sure the 77 models have the earyest kind of electronic ightion and it needs to be checked to see if it's working. The distruber pickup fails, the timing chain fails and the distubutor does'nt turn as the engine turns, the coil does'nt get power from the key as a connection broke or the ingine ballast resitior failed. the igtion module fails too.This module over the life of Ford motor company has cause the physdo-yne Found On the Road Dead Antother words lots of Fords quit and the days of youre mechanics would say that blue gromet module has left another car on the side of the road.

Hi,

NO problem here, the supplier of the CD player will have an interface(wiring plugs adaptor) that will convert the original wiring to suit the (new) replacement unit. A good Auto Elec will also solve any problems but the interface wiring will illiminate all this. Good Luck

Not right away but it will cause you to lose coolant and the low coolant will cause you to over heat. It's a dealer part but you can probably get one from an auto salvage yard at a resonable price.

Turn signal switch (also brake light canceling switch) most likely bad or bad wire to it or from it. Check, with key on run, for power into switch. Turn switch on, check for power out. No power out switch bad. Power out, trace to rear tailight harness for broken wire.

Your vehicle will run fine on regular unleaded fuel.

only way is to take all keys (3)to main dealer to recode car and keys together(this is not a diy thing unless you have diagnostic computer from manufacturer.it will take no more than 1/2 hour.max...

You need to confirm that there is battery voltage to the battery post of the alternator.If there is then turn the key on and verify that there is power to the field post.If you have no power to the field it will not charge,you either plugged the regulator in before you put it on and ruined the regulator or you may have a bad wire splice between the alternators battery wire and the yellow wire in the regulator plug,check to see if it has 12volts to it at all times.If none of the above,run your own 10 gauge ground wire from the alternator to the block or the have the new alternator tested.

Low battery and faulty connections can cause this issue. Clean battery terminals completely...

Go to your fuse box and pull off fuse number 8, but be prepared to loose the clock memory or you need to power the clock memory wire from somewhere

My 04 Marauder had the same issue...hot air no matter what. No noises and the airflow changes properly but I saw a video on Youtube about replacing the blend door actuator and toward the end it showed how to do a self test to get the codes. I did that and got a code of 025 which I think is the blend door actuator. In doing so, at least for now, the AC is working properly for both cold and hot. The AC system itself is fine and told to me by a local mechanic. Here's the video link: https://www.youtube.com/watch?v=_31kGBxyxy8

Question edited for clarity, make and model names (it is written all over the vehicle :>). Question moved to sub category. For strangeness like that, it is best to take the car to an auto-electrician with a pro grade scan tool. It is a known issue if you want to try and fix it yourself. Watch all the videos, but they deal with gauge problems, not the beeping. Partway down says it is caused by an evap hose leak. https://www.google.com/search?q=2002+Mercury+Grand+Marquis+LS+Beeps+fuel+gauge+rises+with+each+beep ..

there is none. replace door lock actuator about $40.00

As they are two completely separate systems, I would think you have a door switch issue (located inside of the door latch) and a TMPS sensor issue. Your local tire shop should be able to help with the TPMS sensor. For the door switch, you can try cleaning the switch with some contact cleaner, but I have found that it usually requires replacement of the latch to solve the issue of the ajar light.

they re both 3rd generation so body lines match ----- and switching out a rear quarter entails welding and fabing the metal and if damage extends to the wheel well will need to do the same - then finish and blending paint

There is a diagram under the hood with all the vacuum line routing it is either on the hood or the shock tower unless it has come off . It is a color coded diagram .

There is no fuse for electric window, kindly talk more about what you are facing with your car windows. If some windows do not roll down or up this mean you have to inspect power window switch assembly.

Clean your cables and terminals with alcohol and go to the power distribution box and do the same thing then try again to start it if still nothing look at the ground cable on the starter case going to the solenoid if it's frayed or broken you found it if not have the starter bench tested if good go back to power distribution box and check all fuses and relays

Open the hood and take out the black plastic cover for the ac this is the very front cover that has the headlight covers on both sides and it goes across the entire front of the car there are clips that hold it in after you do this you ll see the screws to remove the grill from the radiator support and header panel

seems like tempature is the problem,i had same problem with my 96 f-150 in the cold it start and run fine, after its warmed up it wont want to fire at all, my tempature sensor was bad my truck thought it was always cold when it wasnt, so the engine was chokeing my throttle body,and flooding it, put your foot to the floor hard and crank that thing over and over, shell pop and come alive and it will smoke real good to but the chokes open back up after shes runnin...hope it helps

Could be your EGR, but misfire i would check either spark plugs and/or ingnition coils