Power and Ground Signal Circuits
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Gold and Silver Plated Pins
NOTE:
When installing new terminals make sure new gold plated terminals are used where they were originally used.
Some engine control hardware components have gold plated pins within the connectors and mating harness connectors to improve electrical stability for low current draw circuits and to enhance corrosion resistance.
Keep Alive Power (KAPWR)
The KAPWR circuit supplies a constant battery voltage (B+) input to the PCM to maintain memory contents when the ignition is in the OFF position.
Power Ground (PWRGND)
The PWRGND circuits are directly connected to the battery negative terminal. The PWRGND circuits provide a return path for the PCM vehicle power (VPWR) circuits.