That big black one going from the battery to the engine block.
Loose connector, wire grounding out, bad sensor.
A light possibly.
Price brakes most expensive brakes and roters for 1992 jeep wrangler
On a 1990 Jeep Wrangler, the IAT sensor is located on the intake manifold. It is a gray, two-wire system situated on the front of the manifold.
Look for a loose plug, or plug wire.
A loose wire can cause a radio to stop working in a 2008 Jeep Wrangler. A blown fuse is another cause and can be fixed by replacing it.
trace back the + wire from the alternator to the fuse panel in front of the battery
Orange
Yes green wire is the earth wire (Grounding)
right where the oil filter is, its that wire that gives you trouble when you try to replace the filter.
A loose or corroded ground wire can cause your 1995 Jeep headlights to blink on and off. Make sure the ground wire is tight and free of corrosion.
The horn is either damage or the ground wire going to the horn is grounding out on metal or another ground wire. Trace the ground wire. The horn contacks within your horn pad might be grounding out also.