Harness Swap Gone Wrong

[Low Country]

Long Story short, I wrecked my truck almost a year ago and have been restoring it on my free time since. I bought a parts truck from a guy for 1k and began tearing it down and moving parts over. Today, after for the most part buttoning up the new wiring and putting in a new battery i turned the key andd.... nothing. Not even the fuel pump primed. Going back to the motor from the parts truck i realized that it was a 350 and not a 305 like the po had told me. From everything I've seen the wiring should be the same. My truck is a '90 tbi 305 single cab longbed, the parts truck is a '89 tbi 350 single cab short bed. Both wt trims. The only things I did to the harness before install was: Lengthen the taillight harness to fit, run a ground wire to my battery from the fuel pump since the po of my truck had the wrong fuel pump in it, and cut and splice in my old ignition wire to my starter since the ring on the new harness was sheared off. I believe i've covered all the bases. There is also a wire i cannot for the life of me find the connector too. There's two of them, one with a blue wire (found connector) and this one with a white wire.

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[Thatlowchevy]

I believe those are for the knock sensors

 

[Low Country]

I believe those are for the knock sensors

where is the second one? i found where one of them went but that sensor needs to be replaced, its the one down by the starter solenoid. I plan on running to the store tomorrow to pick it up

 

[Thatlowchevy]

There should be two if I remember correctly, both on either side of the block. If I’m wrong someone please correct me

 

[AK49BWL]

There should be two if I remember correctly, both on either side of the block. If I’m wrong someone please correct me

I was thinking that was only on the 454?

 

[89RCLB]

That connector looks like it may go to the back of the A/C compressor.

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[Thatlowchevy]

That connector looks like it may go to the back of the A/C compressor.

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You’re 100% right, it’s been years since I’ve messed with a TBI engine

 

[Sean Buick 76]

Have you confirmed good engine grounds?

 

[Low Country]

Have you confirmed good engine grounds?

i have, we did figure out my lock cylinder was bad and swapped that out for a new one. now gauges move, fuel pump primes, windshield wipers and headlights work. try to turn it over and... nothing still. so i rekon its a step in the right direction. All we can think of is the wiring with the starter, i checked diagrams but all i see is two wires going to the starter.

 

[Low Country]

That connector looks like it may go to the back of the A/C compressor.

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went outside to check, there is no connector on my ac compressor, maybe the po removed it on my truck? he did chop up a lot of wires..