The other day i went to turn on the master battery switch and the engine started cranking but not starting. Startled but i immediately shut battery off. Thinking it was faulty ignition switch, i disconnected switch wires completely and it still did it. Going slightly out of logical order, i assumed a hung solenoid so i removed starter and bench tested it; it was fine. So with starter removed, I checked yellow red wire that would go to starter solenoid and whenever there was battery power there was power to this wire. I worked my way up this wire and found no cuts or breaks. I came to a starter relay on top of motor. Thinking this might be the problem, i switched out one of the adjacent relays and nope yellow/red wire was still energized. I got to thinking maybe its a ground issue but ran out of time to work on it and closed up shop for several days. Is it possible that this starter relay would fail closed rather than open if there was a bad ground? Is there a separate ground hook up for these three relays (start, fuel pump and trim)? The reason i ask is the ground was strong enough to crank motor but if these are hooked to separate ground lead, maybe thats the problem? I dont have a manual or schematic so any help or insight would be greatly appreciated.
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