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Ecm relay making a clicking sound

Chevrolet Silverado 1500 2014 Chevy Silverado 1500 5.3 135836 miles
Just finished rebuilding the engine and after installing the engine and trying to start the truck the Ecm relay starter a clicking sound and the Truck won’t start but as soon as I move the wire under the fuse box the car turns on. The wire is under the ecm relay. I’m not sure if the wire is broken or did I miss something while installing the motor. If anyone else had this problem before please let me know thanks 🙏
2ssCamaro from United States a year ago  
2S
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Best answer (according to 2ssCamaro)
2ssCamaro from United States a year ago
Forgot to tighten one of the ground wire
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