So I start my 1994 Ford F-150 with little issue other than it sits for a period of time .It’s a 5 litre.I have these 2 wires that run parallel to each other from near the battery across the front of the truck and into the what looks like the main wiring harness
The small white wire was attached to the negative terminal of the battery and the large red wire,maybe 10 gauge is not attached to anything
Anyone know what these are

 

Whatever they are, it isn't factory. Try following them through the harness and see where they end. Does the truck have any kind of aftermarket lights, sound system, cb radio, trailer brake controller, or any other electrical accessories?

 

Time to start digging.

Maybe an amp turn on wire for a stereo system.
Your crystal ball works about as well as mine.

 

Thank you