Top 10 1998 Mercury Grand Marquis Questions & Answers

crank sencer

To get inside the car .... Use the key in the lock cylinder, unlock the drivers door to get inside. You shouldn't have to reprogram the fob unless it or the keyless module was changed. There may be a blown fuse that supplies the keyless control module (check the owners manual for location). or wires that lead into the Drivers door may be damaged ... The keyless module is located inside the drivers door at the bottom behind the door panel ... do the unlock/lock and trunk release switches on the inside of the drivers door operate the locks and or trunk release? If so it is not the fuse ... and not the wires to it ... And it could be your BCM body control module, located in the dash board to right of your gas petal. Because the number entry keypad (code for that is on the inside of the right passenger trunk bracket arm) also doesn't work I assume it's not the key fobs themselves. Your 98 manual is correct for your car.

while this occurs; do you hear clicking near your right foot area while sitting in the drivers seat? it may be heard very faint (you may have to remove the sound barrier panel under the dash first. Does this problem only happen with "Automatic" lights? Does it happen while in the parking lamps position? I wish to suggest the light switch itself, or the connector at that switch may be loose, or the negative supplying the switch could be loose. But more likely, you should check for a defective BCM, or loose connections to it, located between the lower left of the ash tray area and the accerator petal area (the relay inside on the circuit board may have a bad solder connection to it) ... or the relay inside is bad period.

is not ford,driverside front close to rad #1,and then2,3,4 [same side]and pass. side front 5,6,7,8 [if only 6cyl you have 123and 456?

For the 1998 Mercury Grand Marquis 4.6L V8

Firing Order:
1-3-7-2-6-5-4-8

Cylinders:
........(back).........
|...4...|.......|...8...|
|...3...|.......|...7...|
|...2...|.......|...6...|
|...1...|.......|...5...|
.........(front)

Let me know if this helped, or if you have additional information questions. Feel Free to contact me at FixYa.com!

Are you saying the temp blend door is not working?
If yes, it's the control head or the temp blend door motor on th plenum case under the dash. Buy used on ebay.

DO you have manaul or electroic controls?

If electronic

A/C Electronic Blend Door Actuator The A/C electronic blend door actuator is located on top of the A/C evaporator core housing (19A553) assembly.

• Its function is to move the A/C air temperature control door on command from the control assembly.
• The A/C electronic blend door actuator contains a reversible electric motor and a potentiometer. The potentiometer wiper is connected to the actuator output shaft and moves with the output shaft to indicate the position of the A/C air temperature control door.
• A five volt signal is applied to the ends of the potentiometer. The voltage available at the wiper indicates the position of the potentiometer. The expressed value of the actuator wiper voltage is sent to the control module and matched with the wiper voltage of the module potentiometer. The printed circuit board then drives the actuator motor in whichever direction is necessary to make the actuator wiper voltage agree with the control module wiper voltage.

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manual

#3 is the blend door.

Either your heater control valve is not properly operating or your heater core is clogged. Locate the heater control valve under the hood, should be close to firewall on heater hose, have someone adjust temperature from hot to cold and see if you can see the heater control valve operating if so replace the heater core, if its not doing anything replace it(heater control valve).

instrument panel fuse blown not at all any time,sometimes

(1998 Gr. Marquis) I just found the culprit of my fuse #13 for the speedo, temp and votage gages. I had to remove the gear shifter cover which was not difficult also the metal brace across the bottom and the ignition key, but it was a tiny exposed burr in the overdrive shift button wire just at the end of the gear shift leaver. I elec. taped it up and now, no more blown fuse!

Hi Carnell,here's a link to your cts. Where is the coolant temp sensor located on 1998 mercury grand marquis LS...