Being the truck is a 89, it should run OBD 1 codes. I know smaller cars/trucks are different from larger, but with OBD 1 there was a way to retrieve codes WITHOUT a code reader/scanner, but I can't remember how now. You would go through a process and count blinks of the "service engine light" if I recall correctly.. OBD 2 which requires the scan tool came in in like 94 or 95 if I'm not mistaken.
Maybe someone else here can tell you how to do it without the reader?? (I'm just a pinch too young to remember how my dad used to do it on our family's early 90's Chevy cars/trucks, and all of my vehicles have either been long before OBD1 or have been new enough to have OBD2)
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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