Check Engine Lite. No Codes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

57FleetsideC4 · 02-22-2024, 09:40 AM

Hi, I am doing a 57 chevy pickup with a 6.0 LQ4, 4L80E. I also have a Dakota Digitial Dash with the BIM module to pick up data from the PCM for the dash. I got the truck started only for about 15 seconds and the check engine lite is on with no codes stored. I did unplug the PCM and reconnected power and the check engine lite is not on so that tells me the wire to the lite is not grounded. Has anyone ran into this? This is the first LS conversion I have done so all new to me. Thank You Steve

suburban99 · 02-22-2024, 04:28 PM

Don't know what PCM you are using but on the RED-BLUE connectors the MIL light is pin 46 on RED. It supplies ground to the light. Hope this helps..if you have a scanner that reads live data your can check the status of the MIL light on that as well.

57FleetsideC4 · 02-22-2024, 05:33 PM

Quote:

Originally Posted by suburban99

Don't know what PCM you are using but on the RED-BLUE connectors the MIL light is pin 46 on RED. It supplies ground to the light. Hope this helps..if you have a scanner that reads live data your can check the status of the MIL light on that as well.

Thanks for the information. Mine is a Blue and Green Connector with DBW. I do have a Chinese knock off tech 2 and a acron code reader and will check status of lite. I know it will store codes as I had a fuel pedal code which was my error. Just a odd one. Thanks Steve

57FleetsideC4 · 03-04-2024, 10:10 PM

Hi, I figured out why the check engine lite was on without codes. I am using a Dakota Digital RTX cluster which has a check engine lite. The LED light needs to see some kind of load so had to hook up a separate lite and this corrected the problem.Steve

**derotoreut** · 03-14-2024, 08:24 PM

Hey neighbor. I'm nearby from Darien, NY. Wish I would've seen this sooner. I ran into the exact issue as you and solved the problem by putting in a small light to take some of the load. Problem solved.

57FleetsideC4 · 03-15-2024, 09:08 AM

Quote:

Originally Posted by derotoreut

Hey neighbor. I'm nearby from Darien, NY. Wish I would've seen this sooner. I ran into the exact issue as you and solved the problem by putting in a small light to take some of the load. Problem solved.

Thanks Neighbor, I reread all the Dakota manual and there was information on it and that's how I found it. I guess it like adding led exterior lites. Steve

02-22-2024, 09:40 AM	#1
57FleetsideC4 Registered User Join Date: Oct 2020 Location: CHURCHVILLE NY Posts: 483	Check Engine Lite. No Codes Hi, I am doing a 57 chevy pickup with a 6.0 LQ4, 4L80E. I also have a Dakota Digitial Dash with the BIM module to pick up data from the PCM for the dash. I got the truck started only for about 15 seconds and the check engine lite is on with no codes stored. I did unplug the PCM and reconnected power and the check engine lite is not on so that tells me the wire to the lite is not grounded. Has anyone ran into this? This is the first LS conversion I have done so all new to me. Thank You Steve __________________ My 57 Fleetside C4 build. http://67-72chevytrucks.com/vboard/s...d.php?t=817054

02-22-2024, 04:28 PM	#2
suburban99 Registered User Join Date: May 2014 Location: Mission BC Posts: 452	Re: Check Engine Lite. No Codes Don't know what PCM you are using but on the RED-BLUE connectors the MIL light is pin 46 on RED. It supplies ground to the light. Hope this helps..if you have a scanner that reads live data your can check the status of the MIL light on that as well. __________________ 1962 C10 Longbox LS 5.3 4L60E----Sold$$ 2014 Ram 4x4 3500 Laramie Diesel..Momma's truck 2015 Ram 4x4 1500 1997 Boxster. 1972 K10 Custom Deluxe LS 6.0 1950 GMC 3100 S10 & LS swapped

03-04-2024, 10:10 PM	#4
57FleetsideC4 Registered User Join Date: Oct 2020 Location: CHURCHVILLE NY Posts: 483	Re: Check Engine Lite. No Codes Hi, I figured out why the check engine lite was on without codes. I am using a Dakota Digital RTX cluster which has a check engine lite. The LED light needs to see some kind of load so had to hook up a separate lite and this corrected the problem.Steve __________________ My 57 Fleetside C4 build. http://67-72chevytrucks.com/vboard/s...d.php?t=817054

03-14-2024, 08:24 PM	#5
derotoreut Roto Reuter thats the name... Join Date: Feb 2010 Location: Darien, NY Posts: 1,853	Re: Check Engine Lite. No Codes Hey neighbor. I'm nearby from Darien, NY. Wish I would've seen this sooner. I ran into the exact issue as you and solved the problem by putting in a small light to take some of the load. Problem solved. __________________ ~ Dan My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977

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