How to remove and install the ignition switch on Mercury Grand Marquis?

To remove the ignition switch the following steps was followed; one was to disconnect the cable from the negative terminal of the battery. After that, it is necessary to take off the steering column on both sides and the knee bolster. For models from 1996 and earlier you have to remove the retaining nuts and then lower the column to get to the switch screws. In those models that were manufactured from 1997-2004, the switch lies to the right of the steering column and to get at it, one has to pull out the metal reinforcement panel behind the knee bolster. Disconnect the cruiser multi-function, insert the ignition key to the RUN position, loosen the two switch installing screws; the ignition switch pulls out from the actuator pin. In installation, make sure that the actuator pin slot of the new ignition switch is in the RUN position and simply place the new switch over the actuator pin and tight the retain screws in place while switching the position of the new switch up and down to match the position of the screw holes. I then replaced the electrical connector to the switch, put the upper steering column cover into position and tighten the nuts to hold the steering column into position. Last, reattach the lower column covers along with the succeeding lowering of the insulator panel, and reconnection to the negative terminal of the battery.

Genuine Mercury Grand Marquis Ignition Switch

Starter Ignition Switch

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3 Ignition Switches found

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Mercury Grand Marquis Ignition Switch Assembly
Part Number: 5W1Z-11572-AA
$41.19 MSRP: $66.73
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Product Specifications
- Other Name: Switch Assy - Ignition; Ignition Switch
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Grand Marquis | 8 Cyl 4.6L, 8 Cyl 4.6L Romeo SOHC EFI | 4AT 4R70W, 4-Speed Automatic Transmission 4R75E Livonia, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Mercury Grand Marquis Ignition Switch Assembly
Part Number: F29Z-11572-D
$29.28 MSRP: $43.64
You Save: $14.36 (33%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Switch Assy - Ignition; Ignition Switch
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1980-1989 Mercury Grand Marquis | 8 Cyl 4.2L, 8 Cyl 5.0L, 8 Cyl 5.8L | 3AT, 3AT C4, 3AT C6, 4AT AOD
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Mercury Grand Marquis Ignition Switch Assembly
Part Number: F4DZ-11572-B
$48.14 MSRP: $75.45
You Save: $27.31 (37%)
Product Specifications
- Other Name: Switch Assy - Ignition; Ignition Switch
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1996-2004 Mercury Grand Marquis | 8 Cyl 4.6L | 4AT 4R70W
- 1990-1992 Mercury Grand Marquis | 8 Cyl 4.6L, 8 Cyl 5.0L | 4AT, 4AT AOD, 4AT AODE

Mercury Grand Marquis Ignition Switch

The Mercury Grand Marquis Ignition Switch allows the driver to start the car, power the components, and lock the steering column. In these Mercury sedans, the column-mounted Ignition Switch routes battery current to the starter at START, to the engine and electronics at ON, to components at ACC, while OFF cuts all power and LOCK also fixes the steering wheel. The early Grand Marquis models applied a simplistic key and tumbler that was prone to wear. But by the 1980s, the Ignition Switch worked with a chip-coded key so the engine would crank only when the computer recognized the code. This would stop thieves even if they broke the lock. Later incarnations of the Grand Marquis follow the industry trend of implementing push-button start fobs that remove the metal key but continue to utilize an internal Ignition Switch logic that waits for a verified signal and brake pedal input to energize the starter. For all its years of major updates and tech enhancements, the Mercury design might not look quite like a normal Ignition Switch, but in terms of reliable power distribution these days with firm detents. A worn Ignition Switch shows itself via stiff key turns, unexpected stalls, or dead components warning drivers to replace it before everyday trips in a Mercury Grand Marquis become risky.

We provide a wide range of Mercury Grand Marquis Ignition Switch at the optimal prices. If you need Mercury Grand Marquis Ignition Switch, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your doorstep with a fast delivery service.

Mercury Grand Marquis Ignition Switch Parts Questions & Experts Answers

Ignition Switch Assembly
5W1Z-11572-AA
Q: How to remove and install the ignition switch on Mercury Grand Marquis?
A:
To remove the ignition switch the following steps was followed; one was to disconnect the cable from the negative terminal of the battery. After that, it is necessary to take off the steering column on both sides and the knee bolster. For models from 1996 and earlier you have to remove the retaining nuts and then lower the column to get to the switch screws. In those models that were manufactured from 1997-2004, the switch lies to the right of the steering column and to get at it, one has to pull out the metal reinforcement panel behind the knee bolster. Disconnect the cruiser multi-function, insert the ignition key to the RUN position, loosen the two switch installing screws; the ignition switch pulls out from the actuator pin. In installation, make sure that the actuator pin slot of the new ignition switch is in the RUN position and simply place the new switch over the actuator pin and tight the retain screws in place while switching the position of the new switch up and down to match the position of the screw holes. I then replaced the electrical connector to the switch, put the upper steering column cover into position and tighten the nuts to hold the steering column into position. Last, reattach the lower column covers along with the succeeding lowering of the insulator panel, and reconnection to the negative terminal of the battery.