what is this???????????????????????????

[/quote]That's definately the flux capacitor

yeah man you better not go over 85 mph you might end up in the 80's or something

hopefully 1987 so i can buy my truck new and put in a garage locked up and go back to 2005 and that hoe will be brand new

well it will be old but i perfect condition

i think thats actually the sensor for your headlight fluid level, if you go in your truck at night with a flashlight, it has to be pitch black out, no full moon either, and turn off the interior light, shine the light on the right side of the dash at a leftward angle, you should see a picture next to the check engine light, it will have pic of a headlight and the word " fluid " will be inside of it, if its not that it may be the temperature sensor for your swiss muffler bearing, and if its not that i really have no idea

Hey your wiring looks like mine. lol

HAHAHA...Just as I thought.

drpgmazda what are u smokin? i want some and the wiring is just because im gonna redo it all and im running it out side the fender well thru the inner fender so i can shave my firewall up..

damn that was pretty good drpgmazda

Nope you guys are all wrong...
That's the P31 Space Modulator harness.

That brings up a good point...
If this is harness is used for the headlight fluid sensor, the wiring will be made of KT40 wire, and 5051 nylon polymers. However, if the light on the dash is on, be sure to fill your headlights full of Marvel Mystery Oil, and be careful sealing them back up. If your headlights don't have the same amount of fluid in each one your beams will not be straight. One time, one of mine got low and I could see around the corner before I turned.

In all seriousness...
I looks like your OBD0 plug.