Need help figuring out what wires are what for '89 front signal light plug!

[Daven]

Ok, so i got in my accident and it ended up also breaking the plug for my front drivers side signal/running light. I went and bought a plug and it is the correct plug, no problems there. The problem is, for whatever stupid reason, they have all three wires black. So i have no clue what wire goes to what lol. Which sucks big time because this is pretty much the last thing to do before i can drive it around again. The original plug was so screwed up that i couldnt look before at what wire was where.

There is a green, black, and a grey-ish coloured wire to plug into. In the pick i posted, it shows the new plug with the 3 black wires... I was hoping someone could tell me what wires are which based on the left/center/right wire setup. The plug didnt even come with anything other than the plug in the box. No instructions, nothing. Soo stupid lol.

 

[Daven]

Same colour wires as this. This is a different socket tho, but from an explorer so same thing i would assume pretty much. How could i find out wat wire is what on the black wire plug i have now? All it says on the wires is made in whatever country lol

 

[Daven]

Ok, i went down to the shop and asked them about it and asked if they could figure out what wire is what. They couldnt figure it out for sure, but told me that 2 would be positives and the other a negative. And to just take 2 wires and hook them up different ways until the bulb lights up. So i did that and it worked, so problem solved. Sorry about the post, i just figured this was a bad idea but according to them, bulbs dont really need to be wired any certain way as its just passing thru one end and going out the other.