Question about 1998 Mercury Mystique

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1998 Mystique brake lights don't work while the window brake light does work.

Anyone know where I can get an electrical schematic for a '98 Mercury Mystique brake system? The window brake light works while the tail brake lights don't. Brake fuse is good and the turn signals work.

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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

  • sassynwenchy Jul 18, 2011

    There is a short in the wiring harness that connects the brake light switch and the cruze control switch. You will need to replace that wiring harness. I found out that that part is no longer made. You will have to go to a junk yard to get this part. The brake light switch/cruze control is on the brake pedal.



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98 mercury mystique oroblems

Two different problems. Check the linkage between the ignition switch and the transmission interlock. Also check for a brake-light interlock - if the brake lights don't light when you press the brake pedal, the brake light switch may be the cause of that problem.

As to the fan... are we talking about the heater/AC fan or the radiator cooling fan? Either may be as simple as a blown fuse - check the fuseblock under the hood.

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What number fuse is my brake lights in a 1998 mercury mystique fusebox

Sounds like loose wiring to either the earth or Postive connection in the main running wiring. rechk all connections particuarly yr pull off/on connections. Most fuses run at 10A for lights, but this depends on how many using this fuse. Chk that power is getting thru to various points with a meter, this will show u where the porblem lies. cheers

Aug 04, 2012 | 1998 Mercury Mystique

1 Answer

Brake lights not working. bulbs are good. brake light switch working correctly. turn signals & tail lights work correctly. The third brake light is working correctly also...

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

Nov 09, 2010 | 1998 Mercury Mystique

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No brake lights on both sides but all other lights work , replaced bulbs

On these models if the lights won't work you won't be able to shift out of park because its all incorporated into the safety device for you locking mechanism in the shifter console. Take apart each light clean every contact and apply electrical gel to each one then try it.

Nov 04, 2010 | 1998 Mercury Mystique

2 Answers

I have shorted out the electrical system in a 1998 mercury mystique. I still have somethings like the horn, headlights and dashlights but not the power locks, windows, brake lights, signal lights etc. \it...

Check all of the fuses located in the black box under the hood close to the battery on top of the inner fender. All power to the car begins there. Check for large fuses 30 amp to 60 amp. Make sure the heater fan is left unplugged. When working on components under the dash always disconnect the ground cable from the battery

Jun 14, 2017 | 1998 Mercury Mystique

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My mercury mystique 98 the 2 brake lamps doesn'y work only the 3rd in the middle

what you have is an improper bulb or bulbs. A local Wal-mart has a directory for selecting the right type of bulb or bulbs for your car

Apr 26, 2010 | 1996 Mercury Mystique

2 Answers

My break light is not tuning off(i dont mean light on dash board).the light at the rear of the car(mercury mystique 1998)

It could be the switch on your brake pedal or it could be a short in the brake wiring harness causing the brake light to stay on.I,m not sure but I would also check to see if those cars have a relay in the brake circuit.

good luck

Nov 01, 2009 | 1998 Mercury Mystique

1 Answer

Tail break lights don't work. Window break light does work however. Bulbs have been replaced.

Check the brake light fuse. The high mounted brake light (third brake light) is on a different circuit than the brake lights. Hope this helps.

May 23, 2009 | 1998 Mercury Mystique

1 Answer

Rear taillight problems

I had the same problem with my 1996 Mystique about a year ago. The brake and tail lights stopped working, except for the center brake light in the window. Turned out to be oxidation of the terminals at the connector on the turn signal. Yes, that's right, turn signal. The electrical signal to the tail lights goes thru the connector on the turn signal. To fix, I cleaned the contacts and the brake lights started working again. Hope this helps. Cheers, Henry

Nov 25, 2008 | 1998 Mercury Mystique

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