QuestionDear Doug,
I bought my '94 S10 Blazer, 2 Wheel Drive, Auto, Vortex V6, (no airbags) new. I now have over 420,000 miles. Yesterday, I started it OK, and as I took off, I had no speedometer, no amp guage, and when I turned my headlights on, the warning horn sounded until I turned off the lights! Today, I started it ok, but I had no dash warning lights when I turned the key on. I did have fuel guage and oil pressure guage. A few other things no longer work which are not related, but the warning horn always comes on when I open driver door with or without the key in the ignition. (This has been a problem for the past few years). I suspect the ignition switch which was replaced around 150,000 miles. If you agree, can you tell me how to go about changing both the ignition switch and the key cylinder - if you think a very basic mechanic (me) should tackle the job? If I get into the steering column I will replace the turn signal switch because the left turn "return" doesn't work. My local auto parts store has the new parts at an affordable price. I really need to save $$ since I was laid off in December and really need my truck to find another job!!
I used this site in the past to fix a starter on a small garden tractor and I really appreciate what you folks do. Thanks for whatever advise you can give.
John
Answer
ignition switch
Hi John:
Most of the time when this happens it's the ignition switch located at the base of the column.
In order to replace the switch, the lower dash tray must be removed to allow the steering column to be lowered from the dash mount.
Once the steering wheel is resting on the seat, you can access the ignition switch mounted on the top of the steering column tube. I think you will find the switch has some evidence of burned contacts and that is why it no longer feels and responds the way it should.
The part is relatively inexpensive, but it's a little labor intensive to get it. The good news is you do not have to disassemble the column to get to it, but you do have to adjust it properly when installing it to hit all the key positions.
If you want to change the ignition lock cylinder (the key part), that is a different procedure.
I'm enclosing a picture of the ignition switch for you to view,so you know what you are looking for.
As for the turn signal switch not canceling, the only thing you need is a cancel spring, not an entire switch. They cost about $1.00 at your local GM dealer. Here is the part number: 1964784
To replace the spring, you will need the same procedure as the lock cylinder, (and it's less involved than replacing the switch completely) so let me know when you want to proceed.
