Weird Electrical probs 87 740 GLE

I made a 150 mile trip to a friends condo last night and when i started her up this morning and put on my lights i lost all my gauges, the it was showing that my high beams were on, and both my turn signals were on. When I flicked to high beams the indicator went out and my high beams came on. It was pretty cold this morning say 10 degrees but i have started her up in much colder conditions before with out a problem.

When i turned the lights back off gauges came back but i can still slightly see the turn signals faintly. I then just left my lights off and headed for home, about 45 min into the trip i tried the lights again and everything seemed normal.

I started it up again later and same thing, my trip wasn't long so i didn't really have a chance to let it warm up.

I haven't looked at fuses yet, but seeing that the problem cured it self after it warmed up i am guessing something else. Also i noticed that the light for the shifter is out, that happened this past weekend, but i didn't notice the problem till this morning.

So what do you guys think?

my thoughts go to an earth fault,try pushing on dash to see what happens,otherwise trace allgrounds under dash(pig of a job).

I will try and look for some lose grounds when the temp warms up a bit

Under the hood, inside fenders, behind the headlights. Ground terminals. Clean, inspect, etc.