Question about 1991 Chevrolet S-10 Blazer

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Ingnition switch or actuator

In my 92 s10 blazer I put the key in the ignition and turn to the start position nothing happens. So I hot wire the starter with the key in the run position and the vehicle starts and runs fine. I am wondering if its the ignition switch or some kind of actuator in the key assembly and if its something a novice can fix rather easily with a chiltons book and a few of the right tools. I'm tired of lifting my hood to hotwire the vehicle and have tried a new key just to see if the other one was sloppy. Help me please -=)

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  • macdug1963 Jul 25, 2008

    My son's 91 Blazer started just fine but when he pulled away the engine stalled and there was no power to anything. He tried to restart with no results (that is; turn the key and nothing). Hooked up jumper cables with same result,, no lights, radio, wipers,, no electrical power whatsoever. Could this be the alternator/ voltage regulator, or maybe the ignition?


1 Answer

On the 92 S-10 it sounds like the actuator rod that is connected to the ign switch on the bottom of the column could be possibly bent or the rack and pinion could be broken inside the column. The ign switch my be out of adjustment. You can try to adjust the ign switch on the bottom of the column yourself. If that does not work,my suggestion is if you are a novice is to take your vehicle to a mechanic to get the steering column fixed.

On the 91 blazer there are 2 fusible links that the battery cable connects to on the starter. Jack the vehicle up & use jack stands under the vehicle. With a test light check to see if there is power to the starter solenoid where the battery cable is hooked to. If there is power find the 2 wires that are on the same post that the battery cable is hooked to on the starter solenoid, they will have a white piece of round plastic (about a inch long) with a wire going into and out of it. This is the fusible link. Probe the wire before and after the round plastic. If there is power on one side and not the other side,you will need to replace the fusible link. You can use a inline fuse holder with a 25 to 30 amp fuse to replace the the fusible link.The fusible links supply power to the vehicle inside for the lights, radio, wipers,ign switch, etc.

Posted on Aug 30, 2008

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Nothing works? How about the headlights, do they work? If yes, then start checking all fuses in the Power Distribution Center or Box under the hood. If no, then look for a bad maxi-fuse in the PDC, and check for a bad fusible link between the battery and the PDC. The battery positive cable goes to the starter, but a pigtail lead off the positive would go to the PDC, to distribute power to all the various circuits on the car.
When you turn the key to on, does the dash light up? If yes, at least power is getting to, and going through the ignition switch. One could then check for power on the starter solenoid wire when key was held in crank or start position.
If nothing when turning key to on-no dash lights, nothing-then check for an ignition fuse in the PDC. If fuse is good check for power being available at the ignition switch connector. If no power there, check wiring between PDC and the ignition switch-if power is up to the switch, but nothing happens with key on, no dash or warning lights, then could have a bad ignition switch.
It just sounds like a maxi-fuse has blown, or a bad fusible link. Good luck.

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  1. Disconnect battery ground cable. Remove the steering column shroud by removing the four or five self-tapping screws. Remove tilt lever (if so equipped).
  1. Remove instrument panel lower steering column cover.
  1. Disconnect the ignition switch electrical connector.
  1. Rotate ignition key lock cylinder to the RUN position.
  1. Remove the two screws retaining ignition switch.
  1. Disengage the ignition switch from the actuator.
  1. Adjust the ignition switch by sliding the carrier to the switch RUN position. NOTE: A new replacement switch assembly will be set in the RUN position as received.
  1. Check to ensure that the ignition key lock cylinder is in the RUN position. The RUN position is achieved by rotating the key lock cylinder approximately 90 degrees from the LOCK position.
  1. Install the ignition switch into the actuator. It may be necessary to move the switch slightly back and forth to align the switch mounting holes with the column lock housing threaded holes.
  1. Install retaining screws. Tighten to 5.6-7.9 Nm (50-69 lb-in).
  1. Connect electrical connector to ignition switch.
  1. Connect battery ground cable. Check ignition switch for proper function, including START and ACC positions. Also, make certain that the column is locked in the LOCK position.
  1. Install instrument panel lower steering column cover.
  1. Install the steering column trim shrouds and tilt lever (if so equipped).

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