Trailer Hitch Wiring

[nhl77]

I have an 89 GW with a hitch. I'm not sure if its factory or dealer. I got a conduct tite wiring kit that is supposed to plug in. When I look under the truck there is nothing that matches the plug in. Anybody wire an 89 and have any suggestions? I'm an electrical idiot. Thanks

[coolram]

If it has the factory tow package the plug is tucked up behind the bumper to the left of the hitch(at least that's where it is on my '88).It's black with a black spring-loaded cover and may be covered with dirt.