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Old 26-09-2019, 05:45 PM
HenryM HenryM is offline
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Join Date: Jul 2019
Location: Seoul
Posts: 4
Default Re: HFS4 coil whine when set to DR1

Quote:
Originally Posted by Richard L View Post
the DR1 should not be used with car with EWG, email me so I can set you the correct diagram.
Hello Richard,

I have a PWG and I used this diagram I found on this forum:
http://www.aquamist.co.uk/HFS4/wirin...-N55-N_EWG.gif

Except the two red wires from the 'POWER INPUT' and the 'ECU' harness.
I tapped them from the cigar jack lighter fuse instead because I noticed the red/green 12v feed from the ECU wakes up as soon as I insert the key and stays active even after shutting down the engine and removing the key.
Instead of dropping down to 0v immediately, it stayed at 12v for a while (30 seconds to a minute from faint memory) and start tapering down to 2v slowly.
I didn't think this observed behavior is ideal as a switched power source so I avoided it.

Last edited by HenryM; 20-11-2019 at 12:30 PM.
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