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About 2 seconds after key on, the asd relay shuts off it the computer doesn't see a crank sensor signal. So unless the engine is running or cranking the coil supply volts will turn off.

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Q: Is the input voltage on the coil supposed to be constant 12 Volts or 12 Volts then 0 Volts on a 1997 Jeep Cherokee in-line 6 when you turn the key from off to run position?
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