[my85grandnational]

I know there is a way to get your SES light to blink out the codes that are stored in your computer, but I cant remember what you have to do. I have a 93 4X4 Blazer with the z code engine that has the service engine soon light on, and I would like to know what it is without having to pay someone to pull the code off for me. Please if you know how to get the code off yourself let me know, and also a list of what codes go with # of blinks of SES light. Thanks Dusty

 

[nd4spd18]

Jump terminal A to terminal B on the ALDL connector under the drivers side dash, then turn the ignition to on (not start). The SES light will flash out the codes. Also, you can jump terminal A to terminal H to read ABS system codes.

 

[my85grandnational]

Thanks I figured out how to read the SES light codes, but my ABS light is always on, so how do I read its codes? Does it flash just like the SES light will? If so what flashes mean what codes?

 

[nd4spd18]

Yep, when you jump terminal A to H the ABS light will flash out the codes. At least that's how it works with the 4 wheel ABS system.

You can also jump terminal A to F if you have electronic 4WD, and the 4 high and 4 low indicator lights will flash out transfer case control module codes.

 

[TCossuto]

Anyone have a list of codes handy?

 

[tuknduces]

You should be able to go to your local part store and they can read it for free.

 

[Woogi]

will this jupmer config work with my 92 W code vortec jimmy? My ABS light is on and I would like to read it myself if I can

 

[geneticrider13]

does this work on any s series truck? i have a 03 s10 2wd 4cyl h code

 

[nd4spd18]

will this jupmer config work with my 92 W code vortec jimmy? My ABS light is on and I would like to read it myself if I can

Yes

 

[nd4spd18]

does this work on any s series truck? i have a 03 s10 2wd 4cyl h code

This connector is only on first gens..... second gens have an OBD-II connector which you need a scanner to read. Most autoparts stores have one they let you use for free that reads OBD-II.

 

[D.T.]

How do you read the "blinking?"

I bought a black market reader on Ebay, but I didn't know about jumping the OBD connector.

 

[Freek]

I'm doing this tomorrow hopefully. It will flash the codes? The SES light will blink or something?

 

[ExtCab96S_Dime]

This connector is only on first gens..... second gens have an OBD-II connector which you need a scanner to read. Most autoparts stores have one they let you use for free that reads OBD-II.

You sure that the 94's have OBD-II? I think they may have been OBD-I still, not that it actually matters for this discussion.

I'm doing this tomorrow hopefully. It will flash the codes? The SES light will blink or something?

How do you read the "blinking?"

I bought a black market reader on Ebay, but I didn't know about jumping the OBD connector.

After you jumper the two pins and turn it to the run position, the SES light will flash. Say you have a code 45, for example, the light will flash four times, then pause then flash five times. After each code it will pause for a long period of time. That help any?

Edit: Here, in case I didn't explain it well enough, here is a link with a description. Also for anyone looking for the actual codes, they are on this same link

http://www.freeautomechanic.com/diagnostictroblecodes5.html

 

[MrGoodwrenchGM]

One very easy way to check and diagnose engine codes w/o reader:

Bend yourself a paper clip into a u shape, and insert into terminal A and B or the two upper right terminals on your OBD1. (Goin' MacGyver )

For code readings, check your Haynes Repair Manual if you have one handy, or go to a local parts store and take a gander at one if they'll let you.

 

[actafool4187]

easier way. drive to autozone, they will test it for free and even give you a print out!

 

[nd4spd18]

easier way. drive to autozone, they will test it for free and even give you a print out!

Not for OBD 1 they dont.

 

[ShopDownLite]

I am also having same problem I think nd4spd18 had provided good idea.

 

[bob2231]

One thing that maybe everyone knows,but in case anyone is doing this for the 1st time.When you jump the terminals and turn on the key,the light will flash 12 twice in a row to confirm that you're in diag. mode.
After that any codes that are set will flash twice in a row,gives you time to write them down.
Clearing them without a reader is also easy.Disconnect both battery cables for a min. of 30 seconds,I've also been told 60(my '92 Eldorado said to hold the 2 cable ends together,don't know if that's required for the Blazer but I do it anyway).
Hope that helps.
Signed,
Capt. Obvious

 

[McBride73]

I'm doing this tomorrow hopefully. It will flash the codes? The SES light will blink or something?

yes the SES light blinks the code 1 digit at a time(code 12 for example is 1 flash, pause, 2 flashes)

 

[Icepick94]

Also if you want you can find a Hanes manual or something similar and the codes are in there too