Anyone one out there know why all the new air injection relay and relay connectors are five pin yet on my 2000 grand prix GT, it's a 4 pin connector. I've looked everywhere (except the dealer) and I can't find a four pin connector. It looks like it was designed to use a standard four pin relay, such as the Ignition Main or Cooling Fan 1 relays that you would find in the power distribution box. Other than that fifth pin/wire, it looks virtually identical. The new relay's (I can find) for it are also 5 pin relays. I'm at a loss here. Unless there is missing wire buried back in the harness somewhere, I don't know what I'm supposed to do with this fifth middle pin/middle wire. I'm not 100% certain how this is supposed to be set-up anyway. Whomever owned this car before I did rigged the connector with a standard fan 1 relay by bending the pins so it would stay put and taping it up. Some of the wires were damaged too and just taped up. Probably explains why my ECM fuse blew and sent me on wild goose chase to solve 4 codes that appeared out of nowhere. Fixed now though. I would be grateful for input from anyone who knows about this model year Grand Prix GT.
