The resistor won't hurt anything if it's in series. I imagine that it would go between the ECM and DD input. I'd be leary of throwing 12v to the ECM negative out through anything.
PSI harness - Check Engine/MIL light constant on
- Thread starter SStavin
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The resistor was the fix. For my application I Ran the check engine wire into the Dakota unit and tapped an additional wire from 12v key on source with a 1k resistor in line. You may also be able to use a light bulb
Sounds like DD needs to update their sh*t beyond standard bulbs. It's 2020, people!!
Great news, thanks!
My DD unit is entirely LED. That's the problem, according to DD: the ECU wants to see more resistance to its monitoring voltage, but the LED is too low ohms. DD also noted the option of using a light bulb, but my general warning light (where fasten seat belt light used to be) is LED too, so it likely wouldn't have fixed it.
Damn, this gave me a literal "lightbulb" moment. The SES light I installed into my custom gauge cluster is LED. Been having issues with it staying on and running HP Tuners. It keeps throwing a code saying MIL low voltage. Duh! I'll find a resistor and add it in and see if it works.
1Kohm resistor (https://www.amazon.com/gp/product/B07QG1V4YL) spliced into 12v fixed it!
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