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Its a little bit of a pain. First disconnect your battery, then remove the air bag, then the steering wheel, then remove the plastic bezel around the column, unhook the connections, unscrew the switch, pull it out and put the new one in and do the same in reverse.
On Deville and Fleetwood, remove the left lower sound insulator. On Eldorado and Seville, remove the left side sound insulator.
Remove the Connector Position Assurance (CPA) and detach the yellow 2-way connector at the base of the steering column.
Remove the steering wheel.
Make sure the ignition switch is in the LOCK position to prevent the SIR coil assembly from going off-center.
Remove the SIR coil assembly retaining ring and the coil assembly. Allow the coil to hang freely.
WARNING The SIR coil assembly will become off-center if the steering column is separated from the steering gear and is allowed to rotate or if the centering spring is pushed down, letting the hub rotate while the coil is removed from the column.
Remove the wave washer.
Use tool J-23653-C or equivalents, to depress the shaft lock, then remove and discard the shaft lock retaining ring.
Remove the shaft lock.
Remove the turn signal canceling cam assembly.
Remove the upper bearing spring, upper bearing inner race seat and inner race.
Move the turn signal switch to the RIGHT TURN position.
On Deville, Fleetwood, and 1990 Eldorado, and Seville, remove the multi-function turn signal lever as follows:
Make sure the lever is in the OFF position.
Remove the access cover from the steering column housing.
Detach the cruise control wiring connector. Note the position of the connector when installed in the column.
Pull the lever straight out of the turn signal switch.
On Eldorado and Seville, remove the multi-function turn signal lever as follows:
On 1992-93 vehicles, slide the connector cover toward the front of the vehicle.
Unplug the electrical connector. On 1991 vehicles, note the position of the connector when installed in the column.
Push the lever straight in, rotate clockwise 1?4 turn and pull the lever out of the switch.
On Deville, Fleetwood, and Eldorado and Seville, remove the screw, button, spring, and hazard warning switch knob.
On Deville and Fleetwood, remove the one signal switch arm retaining screw. On Eldorado and Seville, remove the 2 signal switch arm retaining screws. Remove the signal switch arm.
Remove the turn signal switch retaining screws.
Remove the wiring protector and detach the turn signal switch connector.
Gently pull the wire harness through the column and remove the turn signal switch.
If the 3rd brake light always works, then it is the turn signal switch. If the 3rd brake light doesn't work, then it needs further investigation. The turn signal switch is in the steering column, the air bag must be removed and steering wheel must be pulled. Special tools are required. The airbag can cause serious injury.
For Caravan, Grand Voyager, Town and Country, Voyager,
2000-2004 check this guide for change Turn Signal Switch:
The Supplemental Inflatable Restraint (SIR) system must be
disarmed before working around the air bag or SIR system wiring. Failure
to do so may cause accidental deployment of the air bag, resulting in
unnecessary SIR system repairs and/or personal injury.
Disconnect and isolate the negative battery cable from the
In order to disarm the air bag system, allow the system capacitor
to discharge for at least 2 minutes, before performing any removal
Remove the upper and lower steering column shrouds.
Disconnect the electrical connector from behind the combination
Remove the mounting screws securing the combination switch to the
steering column adapter collar.
Remove the combination switch from the vehicle.
Fig. The turn signal (multi-function) switch is attached to the
steering column by two screws
Install the combination switch to the steering column adapter
collar. Tighten the combination switch mounting screws.
Reconnect the electrical connector to the combination switch.
Install the upper and lower steering column shrouds and tighten
the retaining screws.
Reconnect the negative battery cable and check all functions of
the combination switch for proper operation.
Have to pull the steering wheel and go in thru the column to get at the switch. Here we go, 1 Unhook negative battery cable, this will keep air bag from firing accidently 2 remove air bag/horn 3 remove steering wheel retaining nut 4 using a puller remove the steering wheel, make sure the wheels are pointing straight before you turn the engine off, this will make it easier to get wheel back on centered. 5 use a lock plate depressor to depress the lockplate and remove the retaining ring. 6 remove the turn signal switch, there is usually enough slack in the wires to allow the switch to be moved out of the way 7 remove the lock cylinder retaining bolt, and the cylinder, it should pull straight out. 8 reassemble in reverse order, make sure you have the airbag plugged in and bolted down before you reconnect the battery.
The problem is with your multifunction switch.The steering wheel has to come off and you need a special puller for this.Also the air bag is part of the horn pad that has to be removed so the S.I.R system has to be disabled.S.I.R means Supplemental Inflatable Restraint.The indicator switch is part of the multifunction switch.It does not come off like earlier models.If you are not familiar with air bag systems then You should not be trying to replace the multifunction switch on your own.There is also a clock spring that is on the steering column and if it is not installed properly then it will fail and turn the air bag light on.Then it will have to be replaced.The price for that spring here where I am located is over $200.00.Could be more where you are.Hope this info helps.Good luck.
Yep ,sounds lke the switch.and yes on the air bag,no big deal.pull the air bag fuse (or better still the battery) wait 15 min then pull the bag . Just unbolts like a horn button.Pull it out and unhook the yellow lead to the clock spring. GM uses a retention clip on the airbag connector,just slide the little clip out then the connector is normal.Place the bag soft side down while it's out.Have to be sure not to turn the wheel once you start the project.
There is a clock like spring that is for the air bag. If it turns too far the spring will break and the bag will not work.As you remove the yellow clock spring it will lock itself,don't push on the lock button,it will spin around inside and break.
A few special tools involved for a clip on the steering shaft and pulling the wheel ,bet the parts store will rent 'em tho
You will need to remove the steering wheel. If you have air bags it will take some special tools. Without these tools you should not try it. Without air bags, you will unhook the wiring at the base of the column for the switch. there is a mounting bracket that holds the column up, remove it. Remove the screws that hold the switch in. Tie a piece of heavy string to the wires at the base of the column.Pull the switch out till you can get to the string. Tie the string to the new switch wiring, and fish it back down through the column. Then reassemble everything else. Good Luck
To r/r the whole switch, first if you have an air bag, you need to disable the system. disconnect the battery of course, Then remove steering wheel/ air bag.so if you have the sir parts you will have to remove the snapring and remove the coil harness stuff out of the way so you can remove the wavy type washer. I think you then have to compress the lock plate on the shaft to remove the snap ring, get the retaining ring out of there, the lock plate, and then the turn signal stuff and the spring as well. try to keep the turn signal in the off position when you remove it, & unhook your cruise control wiring. then you can pull lever out and remove the hazard knob. I assume you have tilt, so you would have to unscrew it as well. you mightr have to remove the washer stuff. you should be able to get the signal out of there after you unhook its wiring plug. Now you can get the switch out/& the buzzer thing. to getthe lock out you have to put the key in the lock position & remove the screw/ cyl assy. Rick