Last night begun to prep the engine bay for the gas conversion. A carb'd 350 won't require hardly anything from a wiring standpoint. However, I did want to make sure that I retained all factory gauges, and that the factory heat/AC and light circuits all continued to work.
As far as the circuits that the 350 will need for the gauges, I will find a way to re-use the Oil Pressure Switch, (not sure where it goes on the 350 yet,) And i'll also find a way to re-use the temperature sensor which was on the drivers side cylinder head of the 6.5. My TPS, AC, and Alternator circuits will also get re-used on the 350 motor.
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The big concern for me was the glow plug circuit. The glow plug circuit contains a heavy gauged 12V power wire from the junction box, and a sender wire from the cab, which splits off into the 8 glow plugs. They're a crucial point in starting the 6.5 diesel, so that's a solid 12V that would be a very "HOT" wire that I wouldn't want just laying around the engine bay, so I wanted to make sure to completely remove that circuit all the way back to where it enters the cab.
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Easiest way for me was to just sit in the engine bay and cut back all the wire loom and remove what wasn't needed...
Now as far as wiring...... I could have removed the dash, and traced every wire back from the dash to the engine bay and removed everything that wasn't needed. However, I didn't want to disturb any of the factory harness, as I still need things like the heater module, gauges, AC, lights, radio, etc, etc to work.
When I swapped from electric injection to mechanical injection, I just used sealant and then electrical taped the sockets shut for any excess circuits. Then I zip tied them out of the way. Yes this will result in a TON of excess wires under the dash that essentially do nothing, BUT. By pulling the diesel oriented fuses and power wires from the junction box, i'll make sure all of those circuits are dead.
I'm not too thrilled about all of the excess wiring, but I just really don't feel good about further hacking up the factory harness risking shorts and other electrical issues down the road.