How to look up Service Engine Soon codes without scan tool

[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.