| Steps | _Key Off
_Breakout box installed _Processor disconnected _DVOM on 20 volt scale _Disconnect BOO circuit from 14290 harness (12 pin connector) _Measure voltage between Test Pin 2 at the breakout box and engine block ground |
| Result | Is voltage greater than 10.5 volts? |
| Direction | YES
Remove breakout box. Reconnect processor. Service short circuit. Rerun Engine Running Self-Test. NO BOO circuit OK. GO to Shop Manual, Group 32 to service stoplamp circuit |
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