Electrical Problem... No power to windows and temp guage is faulty
I am a new owner of 1991 BMW 318i with an m50 engine swap. I just recently replaced the starter and was so happy to have my car up and running again. My ignition switch went bad so I wired a push button starter to save money over replacing the whole ignition.
Problems I am now having:
1. All windows will not roll up and down... I took a multimeter to the fuses and they all have power(fuse17 i believe is for the windows) the relays do as well. I am not getting power to any of the switches on the center console that roll up the windows though. It is like there is a wire shorted or something in between the fuse box and the window circuit or something. The light that lights up the switches is not lighting up as well, so this tells me it is electrical
2. Temperature gauge in the gauge cluster is permanently set to way hot. When I start the car it stays at cold for about 10 seconds then sky rockets to way past hot. I had my friend check it out and he said the engine isn't overheating or anything so it must be part of my electrical problem.
3. My tachometer... It starts working after I drive for a little bit, but it just sits at 0 for the first few miles and then it finally kicks in and works fine...
If anyone has any ideas of what to check or any tips that would make this easier than going through every wire and checking to see if they are connected or shorter that would be amazing. Fuses are fine, relays are fine, switch that controls the windows on and off is fine, so keep in mind it is most likely something electrical.
Any help would be greatly appreciated!