SUV was running great but broke the timing belt

Thanks. I am not an expert and the one diagram provided is not enought for me to understand the situation. Unless the blocks on the top are the computer, the connection to the computer from the blk-red from the crank sensor is not shown. But the block on the top right (connection from blk-red on crank sensor) shows blk-red wires and the computer has none of them connected, so I'm figuring the blocks on the top are not the computer pins.

Can you tell me what the blocks at the top are, and where the blk/red from the crank sensor exiting the diagram to the left goes? Can we run the blk-red on crank sensor to the correct pin on the computer?

More importantly, do you have any idea what could cause two prongs of the crank sensor connector to show connectivity (blue light on tester), but the blk/red to be dead (no light on tester, no spark on two coils driven by that sensor signal). That is the bottom line -- what to do next.

It is a 24 valve 3.0 V6. The engine was running fine (quite well really) but overheated when it broke down (the temp on the inticator shot up just as the breakdown occurred). Once I put the rebuilt heads on and the engine back together, one of the coils (two cylinders) was not firing. Four cylinders were firing indicating that the timing was set right. So I began to trouble shoot the ignition problem. One thing after another did not solve the problem, so now everything in teh ignition circuit is new -- coils, computer, ignition module, crank and cam sensors. But the same problem still occurs -- one coil is dead. Swap the coils, same thing. When I pull off the crank sensor cap -- on the side going to the computer -- the two working leads show connectivity (blue light on the tester) but the non-functioning lead shows no connectivity (no blue light on the tester). That is where it stands now.

Nope, blk/red is dead on cam and crank sensor leads. The other two leads show connectivity on both.

That is what I am trying to do. The wire goes into a harness within a corrugated cladding and presumably through the firewall to the computer in the passenger compartment. How do I go about checking it back to the computer? Can you tell me which computer pin that blk/red wire connects to?