Where is the turn signal switch located in a 96 Cadliac Eldorado?

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O2 sensors are all screwed into exhaust system there are from 1(older) to 4 (modern 2 exhaust circuits). The uppers are located before the catalytic converter and the lowers after the catalytic converter. They generally need to be replaced between 50-100,00miles as recommended by the manufacturer.

On 95-97 and possibly 1998, Chevy Blazers both the turn signal and hazard flashers are located behind the lower dashboard trim just to the left of the cigarette lighter. You can not get to it without taking apart the trim. Thank you for asking ChaCha please be sure to ask ChaCha another question again soon!-------------------------------------------------------------------------------
Truck & Heavy Duty Diagnostic tool

Turn Signal Switch REMOVAL & INSTALLATION CAUTION
Some models covered by this manual may be equipped with a Supplemental Restraint System (SRS), which uses an air bag. Whenever working near any of the SRS components, such as the impact sensors, the air bag module, steering column, and instrument panel disable the SRS. Deville, Eldorado, Seville, and Fleetwood - Early Models

1. Disable the SIR system.
   1. On Deville and Fleetwood, remove the left lower sound insulator. On Eldorado and Seville, remove the left side sound insulator.
   2. Remove the Connector Position Assurance (CPA) and detach the yellow 2-way connector at the base of the steering column.
   3. Remove the steering wheel.
   4. Make sure the ignition switch is in the LOCK position to prevent the SIR coil assembly from going off-center.
2. 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.
   
3. Remove the wave washer.
4. Use tool J-23653-C or equivalents, to depress the shaft lock, then remove and discard the shaft lock retaining ring.
5. Remove the shaft lock.
6. Remove the turn signal canceling cam assembly.
7. Remove the upper bearing spring, upper bearing inner race seat and inner race.
8. Move the turn signal switch to the RIGHT TURN position.
9. On Deville, Fleetwood, and 1990 Eldorado, and Seville, remove the multi-function turn signal lever as follows:
   1. Make sure the lever is in the OFF position.
   2. Remove the access cover from the steering column housing.
   3. Detach the cruise control wiring connector. Note the position of the connector when installed in the column.
   4. Pull the lever straight out of the turn signal switch.
10. On Eldorado and Seville, remove the multi-function turn signal lever as follows:
    1. On 1992-93 vehicles, slide the connector cover toward the front of the vehicle.
    2. Unplug the electrical connector. On 1991 vehicles, note the position of the connector when installed in the column.
    3. Push the lever straight in, rotate clockwise 1?4 turn and pull the lever out of the switch.
11. On Deville, Fleetwood, and Eldorado and Seville, remove the screw, button, spring, and hazard warning switch knob.
12. 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.
13. Remove the turn signal switch retaining screws.
14. Remove the wiring protector and detach the turn signal switch connector.
15. Gently pull the wire harness through the column and remove the turn signal switch.

The interior fuse box locations - 1995-97 Town Car
The engine compartment fuse box locations - 1995-97 Town Car
The interior fuse box locations - 1995-96 Continental
The engine compartment fuse box locations - 1995-96 Continental

you have 4 o2 sensors on the new one 2 in front of catylitic converter and 2 after on the exhaust

Under dash passenger side of steering column just kinda hanging there. round and has two prongs.

hello what i would do is take it back to the mechanic have him check the plug into the ign switch either all the contacts are contacting ,defective switch ,what your explaing sounds like a broken ground somewhere in the turn signal assembly located in the steering wheel behind the steering wheel goodluck please rate

start with a fuse, then go on to a turn signal relay. turn the level left or right on the steering column with the inginition switch on, if the light in the dash lights up but won't flash, it is the turn signal relay.