I have a 1990 honda prelude, That is having eletrical problems, everytime I turn my car on it blows my 10 amp fuse, to my turn signal switch, and gauges,speedomitor,rpms,gas,etc.There fore, I cant use my blinkers or see how fast im going. What could the issue be?

Hello, The problem is there is a short in the system. What you need to do is this.
Disconnect the battery cable from the NEG terminal and then ground the end of that cable to the body of the car.

The fuse block you have should be dead in that fuse holder position. Put an Ohmmeter set to OHMs and then attach each terminal to one end of the fuse holder positon.

Now your Ohmmeter is acting like a fuse. Do not connect the car battery. Instead look at the Ohmmeter and see if it is at ZERO. Anything that is shorted will make a reading on the Ohmmeter. If there is a reading now, then start unplugging your connections to the turn signals, guages, etc. until you break the connection. When you find the correct circuit, fix that circuit or part.

Next, You should not have had any reading with the Ignition switch off, but you did need to test for that condition. With the Ignition key on, RUN position, repeat your testing. You should find something grounding now. Start eliminating connectors until you find the wiring that is grounding. Then trace that circuit.

You see the power side of the circuit should not be able to reach the body side at all with the switch off. The power side should have very small readings if grounding through a gauge or the fuel sender after the Key is on. What you are looking for is a dead short in one circuit that pegs the Ohmmeter off the scale. Remember to have the scale set to High Ohms.

Things to try without this intricate process would be to remove all of your bulbs on your turn signals front and rear, check your connections to the trans(If Auto)like a bad Backup switch, or Replace the Ignition switch.

I hope this helps you.