Truck Side wiring

[Wagonbacker9]

So here is what I've found. These are the pins on the LS ECU (99-02) that need to be connected to the truck:

Switched power can be sourced from the red wire at the ignition coil.

C1 BLUE
19 PCM IGN Supply (12+ switched)
20 PCM Battery Supply (12+ constant)
33 TCC Brake switch - connect to purple wire on brake pedal (12v normally closed switch)
42 Fan 1 Relay Ground
57 PCM Battery Supply (12+ constant)
58 Serial Data to OBD2 Port
71 Tow/Haul Mode switch (Momentary Ground)
75 PCM IGN Supply (12+ switched)

C2 RED
9 Fuel Pump Relay Control Connects to green/white tracer
10 Tach output signal [connects to white wire behind cluster?]
16 4WD Low signal (only used if VSS on Tcase Output)
33 Fan 2 Relay ground
38 Fuel gauge output (runs level gauge on 96-99 trucks)
46 CEL signal wire
50 VSS output [connect to light blue wire with black stripe and red wire with white stripe in DRAC box?]

So... I beleive the ones in bold are the only ones I'm not fairly confident of what to do with. I'm fairly confident that the rest will be fairly easy to figure out.


NOTE: This pinout ignores EVAP, rear O2s, AC, and probably a few others some people may care about but I tried to make this not just dedicated to my swap, as I've found the info out there for where to actually hook this stuff up seriously lacking (compared to all of the other topics).

Also, I see nothing in the factory harness info I found for oil pressure... this surprised me. Wouldn't it be wise of a MFR to have a low oil pressure safety built into the ECU?