What does this exactly do, can I bypass it , how much for a new one, and do they make aftermarket one. The problem is that I don't have running lights, dash, speedo, fuel gauge, temperature, interior lights, I keep blowing the gauge fuse. I have this plugged in it blows the fuse, have it unplugged and it does not blow fuse, also where can I get schematics online for my truck, it is a 98 tacoma.

 

Well check the wires, you know you have a short to ground if the fuses are blowing, try to check and see if they are getting to the load before it grounds. Also check for loose or frayed wirings. It costs money but if you join alldatapro.com it gives you very helpful stuff for vehicle repairs.

 

Thanks I checked all the wiring and repaired all the nessasary wiring and the fuse still blows, is it possible that this unit is blown up itself. It is my last option.

 

Check the unit itself.... I know it may sound odd, but once at my dealership we had a truck come in and a nail was in the dash panel. Everytime the Speedometer read anywhere above 20mph it went dead to zero. Come to find out, the poteniometer was shorting itself out once it read the 20 mark. If not then get some type of manual to test the unit itself.