Billy 167,
Best thing is to buy a factory manual. I bought one for my truck when I was having trouble with my cruise control. The factory manual was the only book I could find with electrical diagrams. Cost of the manual, $35.00 plus shipping.
Shop around
www.ebay.com
Only other on-line help is to buy a CD and move your computer next to your truck.
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gchemist
1983 Custom Truck
TX Plates: "BAD BOW"
http://www.geocities.com/abetterchemist/index.html