MIL / Service engine light voltage
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TECH Enthusiast
Joined: Jul 2010
Posts: 593
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From: Florida
MIL / Service engine light voltage Anyone know the voltage from the PCM computer to the trouble / error / code light?
Is it going to ground in the PCM or is the volts coming out.
Reason: I'm trying to hold up a light in the dash.
Is it going to ground in the PCM or is the volts coming out.
Reason: I'm trying to hold up a light in the dash.
Last edited by Tramminc; Feb 14, 2019 at 02:15 PM.
TECH Fanatic
Joined: Dec 2017
Posts: 1,467
Likes: 265
From: Bossier City, Louisiana
On my 896 / 411 PCMs, the MIL light wire is supplied with keyed 12 volts positive and will illuminate the check engine light when the PCM detects a code and then provides a ground for the MIL wire.
Rick
Rick
