I changed my spark plugs and wires and now my won't start

Partial wiring diagrams are usually available, but if you want a full wiring schematic, you need a workshop manual or a subscription to a website.

https://www.justanswer.com/chevy/2iqt1-color-code-ignition-module-1988-chev-s10.html

https://www.google.com/search?q=1987+Chevy+S10+2.8+spark+module+color+code+wiring+diagram

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Starter is good,battery and connection,Cap is good no cracks.

you need 3 things, air, fuel, and spark. if u have spark coming from all plugs, then ur good there, if you have fuel, and it still wont start, it may be the maf sensor or one of the other airflow sensors such as the map sensor.

Check if its getting spark at plugs. Check if its getting fuel. Look at air filter.

Start with what is missing to start the engine
Do you have fuel pressure?
Do you have spark?
Is the valve timing ok?

The next time it won't start ,pull a sparkplug wire and see if you're getting fire.Then we'll known whether its a ignition or fuel problem and go from there.

You say light spark, Brown or blue in color. And what brand of plugs did you get?

check for ignition start supply to the coil or series resistor. maybe help.

the car should have a coil pack...when you changed the plugs and wires they cap would have been at the top end of the plug wires. other wise it wil be at the front of the car where the plug wires or sparkplugs run to

The couple across the street from where I live, had the same problem. He also changed plugs and wires and even the coil. I told him to replace the rotor bug and distributor cap and all started running smoothly again. Looking at the bug and cap nothing looked bad other than a little wear. It even checked out using a meter. Only thing I could think of was that there may have been some hairline crake robbing the spark and causing it to missfire.... Don't really know.