Problem #1 , my water temp guage never would go very high. It would barely go past the first line. The car doesn't get hot and the fans come on at around 160, but the guage never gets to half way to the second line. I decided to ground the sender to see if the guage would move. It did. In fact it pegged really fast. When I took the ground away, my gauge went below zero and has stayed there ever since. I drove the car 500 miles today and the needle never moved. It almost looks like the needle is broke. Is grounding the sender a big no-no on these cars?
Problem 2 , I installed some LED headlights before the trip. They look great, but now I'm having trouble with the headlight switch not latching. Would that be related to the low current draw? Or is my switch just worn out?