I recently purchased a1985 D150 318 V8. I noticed a few vacum lines missing that iI can Replace but also noticed a plug near the blower housing that has been cut off. Would like to know what that was connected to. I snapped a picture and it has a pink and white with red strip wire.

 

Could use more info on your truck, not all vehicles use same wire harness depending on engine and other accessories.
Put the info in your profile so it will be in every post.
I have 86 manual and I will try to find out with this plug is for with the above info.

Dave

 

does or did it have a/c?

 

I put everything i know about the vehicle in my profile. It does have A/C power steering and brakes and has the Royal SE trim Package. Someone has disconnected the emission controls, the charcoal canister is missing the Air pump
is disconnected and the belt is gone.
here is the vin if that helps.
1B7GD14T7FS510503
The connector is near the Blower on the passenger side and the wires run into the main harness on the firewall.

 

The wires that were cut were bringing power to the expansion valve of your air conditioner. The other end is in the smallest of three wiring looms at the top of your blower motor as illustrated in the attached photo.

 

The A/C is plugged in and works fine. The plug and wiring in question is running in the larger wire loom behind the expansion valve along with the Blower motor and windshield washer pump wiring. The plug looks exactly like the plug on the blower. I highlighted it on your pic and got a closeup of mine posted.

 

When I get home Sunday, I'll look again.

 

http://www.keatonkolor.info/Dodge/Wiring2.jpgI think this is what you are wanting.

 

Thanks for your help. Now I have to find one of those.