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LS1 Oil Level Sensor wiring for swap clarification

Old 06-26-2012, 07:01 AM
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Default LS1 Oil Level Sensor wiring for swap clarification

Good Morning all,

I am swapping in another LS1 into my E36 BMW after a sneak attack low oil situation led to me spinning the #6 rod bearing. I will try to not let it sneak up on me again this time!

I want to utilize the low oil level sensor in the oil pan to prevent this from possibly happening again.

I am under the impression that one of the two wires from the oil level sensor go to the PCM and the other to ground. Then, from PCM Blue pin 70, it goes to the body connector to power the dash low oil level light.

Would it be possible to splice in a regular red light to pin 70 of the blue PCM connection to be my low oil level light? Does anyone know the output voltage of pin 70? Perhaps I will need to use a relay for it to work but I just want some kind of indication!

The harness is 2000 FBody, thanks!
Old 06-27-2012, 02:38 AM
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I also am wondering this, i would like to keep it functional. but the stock oil pressure gauge doesn't have the warning light...
Old 03-05-2014, 08:10 PM
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Anyone know the answer to this? (yes I realize this is 2 years old)
Old 03-05-2014, 10:37 PM
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The wiring diagrams I see show it is ground being switched.
Old 03-06-2014, 06:26 AM
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You would have to wire something up. It goes to the PCM and out the class 2 data.

02 silveradp
Attached Thumbnails LS1 Oil Level Sensor wiring for swap clarification-oil-level-switch.jpg  
Old 03-06-2014, 06:48 AM
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Use the sw to make ground on a warning lite:
12v to the lite, 1 side of the sw to the neg side of the lite, and the other side to chassis ground.
Oil is OK, float is up, and grnd side of lite is interrupted.
Oil is low, float drops, makes up the lite grnd, lites on.
No need to involve the PCM.
Y/N?
Old 03-06-2014, 06:51 AM
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Originally Posted by Old Geezer
Use the sw to make ground on a warning lite:
12v to the lite, 1 side of the sw to the neg side of the lite, and the other side to chassis ground.
Oil is OK, float is up, and grnd side of lite is interrupted.
Oil is low, float drops, makes up the lite grnd, lites on.
No need to involve the PCM.
Y/N?
As easy as a little LED on the dash. This is a great idea.


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