Well after getting everything dyno'ed and making my 250.3 whp today i noticed my speedometer wasn't working. Then i noticed my a/f gauge wasn't working. So i looked at the fuses under the dash and noticed that the ecu fuse was blown. I tried 5 different ways to fix it and blew all 5 fuses. I can't figure out what i did wrong. I installed the vafc a couple days ago, however with all this happening I haven't got a CEL. Although I have had the battery and brake light come on faintly. I'm assuming these are coming on b/c of the blown ecu fuse. Not too sure though...PLS help!!
Justin

 

Not an expert but you should check all ground wires that you've been messin with and power wires. Maybe one of your power wires is rubbing on the frame.

 

sounds like an open wire/crossed wires.