So my 2004 rx8 with 115K miles does not want to crank. i was able to bypass the issue by putting a push start button to crank. but the radio does not power on and the interior lights. also the abs light and traction light stay on and after about five minutes the gas gauge drops down all the way. i was also able to bypass the no radio power issue and inside light issue with a separate on/off switch but the fuse i put on it blows after a few minutes. i had a 350W amp and sub. i don't know if that would be causing the issue. any help would be greatly appreciated.

by the way i just got this car and it ******* rocks!

 

WTF. Just stop messing with **** and check your fuses. Do not bypass anything unless you want to cost yourself a lot of money. This is not a 65' Chevy.

M A Z D A

Engine ----> Symptom troubleshooting.

 

all fuses are good. replaced the relays also. replaced the starter, could it be ignition switch?

 

You bypassed stuff on this car? Why not just fix the original issue in the first place, before mucking around with electronics that you don't seem to understand? It's probably screaming faults somewhere in the PCM because it was never told to turn on.

Seriously, that would explain the aux power issue, the not cranking issue, and a couple of other things you haven't told us.

Did you even check your grounds?

 

ok thanks.

 

Have you installed that stereo recently? If not, I doubt that it would have caused the issue, but you could always disconnect it to see.
When you turn your ignition switch on without the bypasses, can you hear the engine compartment relays or the fuel pump running? If not, you aren't getting any power, and the ignition switch is most likely bad since you replaced the relays.