Friday, February 25, 2011

how to replace a ignition switch on a 1998 chevy blazer?

1995-98 Models

See Figures 1 and 2



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the ignition and key alarm switch-1998 model

  1. Remove the column shroud halves.
  2. Remove the column-to-dash attaching bolts and slowly lower the steering column, making sure that it is supported.
  3. Remove the multi function switch if necessary.
  4. Remove the key alarm switch, if equipped by gently prying the alarm switch retaining clip with a small screwdriver. Rotate the alarm switch 1/ 4 in. turn and remove.


WARNING
Extreme care is necessary to prevent damage to the collapsible column.

  1. Make sure that the switch is in the Lock position. If the lock cylinder is out, pull the switch rod up to the stop, then go down one detent.
  2. Disconnect the actuating rod from the switch.
  3. Remove the two screws and the switch.

To install:
  1. Before installation, make sure the switch is in the Lock position.
  2. Attach the actuating rod to the switch.
  3. Install the switch using the original screws. Tighten the screws to 12 inch. lbs. (1.4 Nm).
  4. Install the key alarm switch, if equipped . Make sure the retaining clip is parallel to the lock cylinder. Rotate the alarm switch 1 / 4 in. turn until locked in place.
  5. Install the multi function switch if removed.


CAUTION
Use of screws that are too long could prevent the column from collapsing on impact.

  1. Replace the column. Tighten the nuts to 22 ft. lbs. (29 Nm); the bolts to 20 ft. lbs. (27 Nm).
  2. Install the column shroud halves.



Click image to see an enlarged view

Fig. Fig. 2: Exploded view of the alarm switch removal-1998 model




You will need the following tools:

Steering wheel puller Torx bits (get a set, you need 3 sizes) Inverted Torx ( a set is available at Schucks/Kragen/Checker Screwdriver A few zip ties Wire cutters.---------------

Start by disconnecting the yellow wire under the dash for the airbag. Now turn the steering wheel 90 degrees to access the underside of the steering wheel. You will have to insert a smaller size flat blade screw driver into the 4 holes on the back of the steering wheel and rotate them to release the airbag. Now remove the nut holding the steering wheel on and remove the steering wheel. BE VERY CAREFUL WITH THE AIRBAG MODULE!! Now remove the lower column cover with 2 Torx screws. You will now have access to 2 inverted Torx screws that hold the top column cover in place. Look on the top of the ignition cylinder housing and find the small hole. Insert a small Allen wrench into the hole and turn the key to "run" position and the ignition cylinder will come out, now the top cover will come off, giving access to the ignition switch. You will need the smallest inverted Torx bit for the 2 screws that hold the ignition switch in. You will have to cut a couple of zip ties to free the wiring. Now get a Torx bit and a 7mm socket and remove the lower dash panels to get access to the wiring harness. You will need the 7mm to unscrew a bolt that holds the connector together under the dash. Just follow the wiring to see what I mean. Once the connector is loose, you will see two plastic strips that run along side the connector. These are easy to remove and slide off, and are keyed so you cannot reinstall them wrong. Hope this helps.

YOU can use a 3/16" section of brake line to get the two e3 or e4 external torx screws out (holds the ignition switch on) instead of buying the whole kit. Buy a 6" or 8" section of brake line, cut in half, take the cut end and "lightly tap" it on (with a small hammer) the torx head. The metal brake line is soft enough to form around the head. Take a pliers and spin off........they are not that tight nor hard to get off. Otherwise you need to buy the whole smaller external torx kit (2") and most places don't carry them.-----------


max