ECM grounds testing, results normal?
Thread Starter
Supreme Member
iTrader: (2)
Joined: May 2002
Posts: 4,449
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From: Everett, WA
Car: 87' IROC
Engine: L98
Transmission: T56
ECM grounds testing, results normal?
Guys,
I am trying to chase down some gremlins in car. I have recorded the following measurements with the car off and the ECM unplugged.
Key off:
all ecm ground wire resistance to battery ground: 0.00 ohms
all ecm ground wire voltage drop to battery ground: 0.00 volts
Key on:
all ecm ground wire resistance to battery ground: 23 ohms
all ecm ground wire voltage drop to battery ground: 0.06 volts
I have taken the same measurements from battery ground to engine and battery ground to body and find no measurable resistance or voltage drop. So it seems like the ECM ground wires are leaking some voltage with the key on. But my numbers are pretty darn low. Is what I am seeing normal?
Thanks,
John
I am trying to chase down some gremlins in car. I have recorded the following measurements with the car off and the ECM unplugged.
Key off:
all ecm ground wire resistance to battery ground: 0.00 ohms
all ecm ground wire voltage drop to battery ground: 0.00 volts
Key on:
all ecm ground wire resistance to battery ground: 23 ohms
all ecm ground wire voltage drop to battery ground: 0.06 volts
I have taken the same measurements from battery ground to engine and battery ground to body and find no measurable resistance or voltage drop. So it seems like the ECM ground wires are leaking some voltage with the key on. But my numbers are pretty darn low. Is what I am seeing normal?
Thanks,
John
Supreme Member
Joined: Jan 2006
Posts: 3,341
Likes: 10
From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Light Drop (Droplight)
There’s nothing wrong with a 0.06 voltage drop.
What gremlins are you having?
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Happy Racing!
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Make Noise, Turn Left, Repeat
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What gremlins are you having?
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Make Noise, Turn Left, Repeat
.
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