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Old 08-15-2017, 03:51 PM   #6
Korted
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Join Date: Oct 2016
Location: Seneca, KS
Posts: 12
Re: LS wiring Harness layout

The main starter wire follows the oil pan from starter to balancer, then across to the drivers side, and up to a red connection that bolts to the front accessory mount. The top part of the harness forms a "U" on top of the engine (it's actually an "n" if you're standing in front of the engine), with the coil and injector plugs parallel to each other. The cam position and oil sensor are in the back. Trans connections branch off at head 7 (drivers rear) close to these. AC , coolant level, and passenger O2 are the longest leads, and branch from the "n" about head 8(passenger rear). If I remember correctly, the oil pressure and cam position are unique plugs - you cannot find another sensor that uses the same plug type. Worst case, lay the two groups of injector plugs parallel to each other. These two groups of four connect to each other at the rear of the engine.
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