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Old 06-29-2017, 10:09 PM
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shorod shorod is offline
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Re: 1998 Silhouette No Start Condition - Odd Symptoms...

Unfortunately I no longer have access to the GM service manuals to confirm, and most of my experience is with Fords. From what I've seen on Fords, and suspect GM is similar, the injectors receive constant voltage with the key in the Run position (probably battery voltage, but could be 5V) and the ground is switched via driver transistors in the PCM. So you should expect to have constant power and switched ground.

-Rod
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