94 Blazer's got some problems

First question...is there a place where I can purchase a code reader that would be able to read this car, due to its old year?

Second...how many oxygen sensors does the 94 blazer have and what are the locations?

Third...how can i fix a turn signal that doesnt turn off automatically?
And how do i fix the turn signal to get it to blink instead of stay on?

Fourth...Does anyone happen to know where I can buy headlights that would fit my blazer, and be open in order for me to install H.I.Ds

Any help is greatly appreciated!

--94 Blazer, 82k miles, 4.3L Vortec

First question...is there a place where I can purchase a code reader that would be able to read this car, due to its old year?

Second...how many oxygen sensors does the 94 blazer have and what are the locations?

Third...how can i fix a turn signal that doesnt turn off automatically?
And how do i fix the turn signal to get it to blink instead of stay on?

Fourth...Does anyone happen to know where I can buy headlights that would fit my blazer, and be open in order for me to install H.I.Ds

Any help is greatly appreciated!

--94 Blazer, 82k miles, 4.3L Vortec
Big one or s-10 and what engine?
Jumper a and b pins on diagnostic connector and read code flashes with check engine light.
Code readers are mostly for OBD11
Post back check engine light longs and shorts flashes and pauses.

Turn signals that do not turn off are usually broken ears on turn signal switch.

No blink can be bad switch or flasher or bulbs.
Your local parts place should be able to help with head light bulbs.

1. a paper clip does the job quite well
2. one, passenger side exhaust pipe in front of the cat
3. replace the multifunction switch
4. I will assume Hella has conversion headlights; I got a round set for my ancient RV from them