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There is only 12volts for 2 seconds at inertia switch just after key on, it part of computers Boot up softwareRonD im having a similar issue. what would be a cause that if I'm getting 12v from the fuel relay but only getting 7.2 volts into the inertia switch thats as far as I've tracked it thus far. I've replaced the ignition completely cleaned all grounds but still no luck.. and I'm not getting power to my obd2 plug to hook up a scanner