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85 - connected to blue/yellow - 12v when engine running and HRW is on, 0v at other times.
86 - connected to earth - 12v when engine running and HRW is on, 0v at other times.
87 - connected to constant live - 12v at all times.
30 - connected to front screen - 12v when relay on, 0v when relay off.
That all makes sense - what doesn't is no resistance between the switched live 85 and earth regardless of it being connected to the relay or not.
How can it cause battery drain when plugged to the relay?
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Former custodian of the legend that was FE54 - RIP
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