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No fusible link on 1990+.

Have you had the battery load-tested? And removed the battery cables and cleaned the clamps and posts? Don't just go by visual appearance. If you hear a click, at least the starter relay is closing.
 

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warlord said:
i would think reguardless of the batteries condition the jumpstart should give it what it needed to crank
Not necessarily. If the connection between the battery and its cables is compromised by corrosion or loose wires, when you go to jump-start it, your own battery is essentially isolated from the circuit, and you are now using the jumper battery to run its own vehicle and start yours. So, the question remains, did you disconnect both clamps, clean the posts and clamps, and inspect the cables where they connect to the clamps, for corrosion? If not, clean the whole setup. And check the other ends of both positive and negative cables for a good connection.

Do your headlights turn on brightly? If so, observe what happens to them when the key is turned. This will tell you if you are drawing current to the starter or not, when you turn the key.

If you have a shorted cell in your battery, it will drag down the voltage regardless of whether there is a jumper battery. So if the above doesn't work, have your battery load-tested. To do that, it must be fully charged first.
 
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