Re: HFS-3 not spraying
If it lights up 15s after starting the car, then you have a wiring issue. The red wire on the molex connector is the main power supply, BUT the red wire of the gray connector energizes a main relay to let that power flow. So where ever you have the red wire of the gray harness tapped it is not getting power in the pre-crank position to let the system turn on.
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