Question about 1998 Mercury Grand Marquis

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Speedometer, Odometer, Oil Pressure Gauges are out

Yesterday the Speedometer, Odometer, Oil Pressure Gauge, and the Voltage Gauge have all quit working. I'm on a tight budget and would like to do the repairs myself. However, I've never encountered this problem before. Could it be the cable to the transmission or a blown fuse? I'm going to check the fuse box right now as a matter of fact. Any help is appreciated.

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This was a blown fuse on my Marquis. Fuse replacement was the fix.

Posted on Sep 01, 2010

  • cgarrand1
    cgarrand1 Feb 12, 2018

    which fuse?

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It could be a fuse....since a fuse is use just incase you get an overflow in current...and this prevents damage to gauges......

yeah check it first.....

Posted on May 14, 2009

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1 Answer

The odometer is not working on my 1999 navigator. It just says 0. What could be the problem?


Odometer The instrument cluster receives odometer rolling count status from the PCM-engine computer and stores the mileage in non-volatile memory (NVM). When the instrument cluster fails to receive the odometer rolling count status for more than two seconds, the odometer display will show dashes.

HEC Dealer Test Mode
To enter the HEC Dealer Test Mode, depress and hold the instrument cluster SELECT/RESET button and then turn the ignition switch to the RUN position. Continue pressing the SELECT/RESET button (5 seconds) until tESt is displayed in the odometer. The SELECT/RESET button must be released within 3 seconds of the odometer displaying tESt to begin the dealer test mode. Depress the SELECT/RESET button to advance through the following steps until dtc is displayed. Depressing the SELECT/RESET button will display any continuous DTCs stored before proceeding to the next step.

All segments illuminated Illuminates all odometer segments. If any odometer segment is inoperative, INSTALL a new instrument cluster; REFER to Instrument Cluster .
Odometer Display Description GAGE Activates gauge sweep of all gauges, then displays present gauge values. Also carries out the checksum tests on ROM and EE. If the gauge sweep is inoperative, INSTALL a new instrument cluster; REFER to Instrument Cluster . All segments illuminated Illuminates all odometer segments. If any odometer segment is inoperative, INSTALL a new instrument cluster; REFER to Instrument Cluster . bulb Illuminates all micro-controlled lamps and LEDs (low oil pressure/high coolant temperature, low fuel, service engine soon, brake, low range). INSTALL a new bulb or LED as necessary. r Returns to normal operation of all micro-controlled lamps and LEDs and displays hexadecimal value for ROM level (used when requesting assistance from the hotline). If alternating flashes of FAIL and ROM level are displayed, INSTALL a new instrument cluster; refer to Instrument Cluster . EE Displays hexadecimal value for EE level (used when requesting assistance from the hotline). If alternating flashes of FAIL and EE level are displayed, INSTALL a new instrument cluster; refer to Instrument Cluster . dt Displays hexadecimal coding of final manufacturing test date (used when requesting assistance from the hotline). dtc Displays continuous DTCs. Pressing the SELECT/RESET button will display any DTCs stored before proceeding to the next step. enG Displays the English speed in mph. Speedometer will indicate present speed within tolerances. Display will show 0 if input is not received, if input received is invalid for one second or more, or if speed is 0. m Displays the English speed data (mph) received from the PCM via SCP Network. Displays the metric speed in kph. Speedometer will indicate present speed within tolerances. Display will show 0 if input is not received, if input received is invalid for one second or more, or if speed is 0. tAc Displays the tachometer data received from the PCM via the SCP Network. Tachometer will indicate present speed within tolerances. Display will show 0 if input is not received, if input received is invalid for one second or more, or if engine rpm is 0. FUEL Displays the actual A/D fuel level. The fuel gauge will display a filtered fuel level value. This filter will keep the pointer from moving suddenly or erratically. If the value displayed is between 0 and 20, the circuit is shorted. GO to Pinpoint Test D .
  • 255=open send +/-0
  • 232=Full stop +/-10
  • 215=Full mark +/-10
  • 178=3/4 mark +/-8
  • 138=1/2 mark +/-7
  • 93=1/4 mark +/-5
  • 41=E mark +/-4
  • 54="LOW FUEL" (0-59)
  • 0-18=short (0-20 max.)
OIL Displays the code (0-255) for the oil pressure switch input to the HEC. Displays the oil pressure reading input to the HEC. Oil pressure gauge will indicate present oil pressure. Normal oil pressure (greater than 6 psi) will display a value between 000 and 176. A low oil pressure (less than 6 psi) or an inoperative engine oil pressure switch will display a value greater than 176. dEGC Display of engine temperature in Degrees C input from cylinder head temperature sensor. If the value displayed is -40C, the SCP message for engine temperature has not been received for more than 5 seconds. GO to Pinpoint Test E .
  • 49 C="C" mark.
  • 60 C=Normal band start.
  • 120 C=Normal band end.
  • 119 C=Temperature warning indicator ON.
  • "-40" C=No SCP Message for 5 sec.
br Displays the brake fluid level input to the HEC. bAtt Displays the code (0-255) battery voltage input to the HEC. Battery voltage gauge will indicate present battery voltage.
  • 93-102=6.9-9.1 volts (Low voltage)
  • 115-124=8.5-10.7 volts (Norm band start)
  • 215-225=15.8-18 volts (Norm band end)
  • 230-241=16.9-19.1 volts (High voltage)
rhEo Displays the present hexadecimal value for the instrument cluster backlighting pulse width modulated (PWM) input to the HEC (used when requesting assistance from the hotline). rhi
rhS
rho PWM input duty cycle.
SCP hexadecimal dimming step (used when requesting assistance from the hotline).
Output driver counts in hexadecimal format (used when requesting assistance from the hotline). Cr Displays the present RUN/START sense input. Display will show -h with the ignition switch in the START position and -L with the ignition switch in the RUN position. ALtF Displays 8-bit hexadecimal value for alternate fuel level. Display will show a value between 00 and FF if the message is received. PA-PE7 Not used. GAGE Repeats test display cycle.
Turn the ignition switch to the OFF position or press and hold the SELECT/RESET button for 3 or more seconds and release to exit HEC Dealer Test Mode. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics.

Mar 12, 2018 | 1999 Lincoln Navigator

1 Answer

How do I fix my gauges? (Ie, gas gauge, temp gauge, speedometer, odometer)


Fuses? Blown fusible link? Most gauges work by getting 12 volts from the ignition switch when on, and getting a ground from the sender. Often the 12 volt supply wire goes to more than one so if dead, both will fail. If you have a wiring diagram, you might find which wire to cluster should be hot, and trace it backward to find the issue. Easier to check for ignition switch feed first.

Jul 01, 2015 | Cars & Trucks

1 Answer

I have a 1998 Pontiac bonneville se with 218k miles on it. Tachometer works fine. Speedometer works fine. Odometer works fine. Gas gauge, oil pressure, battery, and temp gauges are all fine. Trip meter...


If I had a 1998 car with 218K miles on it and an unimportant thing like the trip meter didn't work I would put a piece of black tape over it and use a GPS as my trip meter.

Nov 17, 2013 | Cars & Trucks

1 Answer

1994 f150 dash gauges not working


Go to fuse panel left of steering column. Ck to see if #17, 10A fuse, is blown.

Nov 08, 2012 | 1989 Ford F 150

1 Answer

My check engine light comes on and my speedometer and odometer stop working until I hit a bump and then they start working


Hi, I can tell you that I was having a simular problem with my 2001 Chevy Silverado. The check engine light would come on and I lost both the speedometer and odometer. I also lost gas gauge, and oil pressure gauge.I would hit a bump and they would start working, but light would stay on. I bought the obd-2 meter to read codes and erase them so the light went off. This continued for 8 months. Finally, I started moving wires around under dash when gauges stopped and they would come on and off? Took me right to the circuit board on the ignition switch. I mean I tried everything possable to solve this and told a G.M. mechanic. He said I was right that it would be the switch and that most of you're wires that go to gauges and speedometer come from the ignition switch. I changed it and it has been fine since. You might try what I did see if you can do this while driving, i don't no, but if so be carful on the road. You may need to take it in also.There is something loose a ground wire or hot doing this. I would bet it is in the ignition switch. Best of luck,
Shastalaker7

Dec 29, 2009 | 1996 Toyota Camry

2 Answers

Instrument Cluster Problem


I have a 1998 Jeep Grand Cherokee that had the same problems you describe.

I cured it by removing part of the dashboard and cleaning/checking all electrical connections.

Any black leads that connect to the metalwork .. they are earth wires. Check them for corrosion and as they are usually just held in place by a screw - undo that screw and retighten it. A 'bad earth' can cause the problems you describe.

Apr 16, 2017 | 1995 Plymouth Voyager

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