Question about 1994 Mercury Grand Marquis
I pulled out the head lamp knob and turned it so the interior lights would come on. Did this several times then the dash lights came on. Now that doesn't solve the problem. Brake lights and turning signals are fine.
It's the terminals for the tail and dash lights on your headlight switch. It is a common problem though Mercury never seems to have addressed it. I've had to change my switch out 5 times in 2.5 years.
Posted on Dec 19, 2012
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Posted on Jan 02, 2017
Try a continuity test, not sure where to find the electrical scheme but if you obtain it, use a tester or borrow one to test the continuity of the wires of both taillights, could be simple as a cut wire.
Posted on May 24, 2009
SOURCE: turn signal does not work
HI. Click here to view a troubleshooting page, that will help isolate the issue. The likely culprit will be the Flasher.
The flasher unit can be found under the dash panel attached to a bracket on the right side steering column opening reinforcement. On some models, the flasher plugs into the fuse panel.
The flasher can be removed by pressing the plastic retaining clip and pulling straight rearward. Align the new flasher housing with bracket and push forward until it snaps into the bracket
Click Here to view the fuse box layout picture.
The mounting of the fuse panel is either on the left side of the passenger compartment, under the dash, on the side kick panel or on the firewall to the left of the steering column. Certain models will have the fuse panel exposed while other models will have it covered with a removable trim cover.
Posted on Oct 26, 2009
Testimonial: "GAVE ME GOOD OPTIONS TO CHECK. NEEDED FUSE PANEL LAYOUT. THANK!"
SOURCE: No dash or tail lights
The same thing happened to my BMW. All my fuses were fine too, what the problem was, was that the fuse that belonged to the dash lights and the brake lights, taillights etc. was wrong. If the fuse is not the correct amperage not everything on that circuit will work. So even though that the fuse is not burnt, the fuse could still be incorrect. Thats your best bet to check.
Your second solution can be the ground on that circuit. Check the grounds that come from the taillights, and find where it connects to the body or the frame with a small screw of small bolt. If the ground is dirty or rusty, it wont make a good connection and you will have loss of lights.
Hope this helps!
Posted on Dec 06, 2009
I believe this car has a rear bulb that has two fillaments, one for side lights the other shared for braking and flash. sounds like a blown bulb or a bad ground connection. Check the bulb and the bulb holder and ground connection.
Turn signal blinking quickly generally indicates a blown bulb front or rear or bad connection.
Posted on Dec 20, 2009
better get a second look at the brake light switch, there might be two, third brake light is on a different circuit, switch light circuit goes to signal switch then brake lights
Posted on Nov 09, 2010
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