For a 1988 Mercury Marquis remove bottom shroud from steering column (5 Philips head screws). There is a wire running from the ignition switch to the left side of the steering column; detach it from the coupler (This can be done without a tool). Turn key to ON position until the panel lights come on. There is a small pin near the bottom of the key lock; push it in and pull the ignition switch out (don't panic if the wire seems to be stuck; it will come out).
To replace, turn new ignition switch to same position. Push pin on the ignition switch in while sliding it back into the steering column. Reconnect wire and then replace shroud.
Remove the wiring harness from your 1999 Mercury Grand Marquis ignition coil. Remove the ignition coil retaining screws. Reverse the process to install your new ignition coil.
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At least $75
It's located on the steering column 2 screws unplug the harnest
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pre-heat spark plug, if this works then replace it.
Mercury Grand Marquis was created in 1983.
take it to the dealer