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Sensor Ground Upgrade

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I'm working on cruiser54's ground upgrade on my 90 comanche. I followed the IAT brown/white wire to a splice with 4 wires going to 2 (one is from the MAP sensor) along with loose shrink tubing. It's the exact same thing that he has in the picture on his sensor ground upgrade tip. Am I supposed to just cut the splice and re solder the same wires?


Also can anyone identify the shiny blue wire with the bare wire coming out of it? Seems strange


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