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Old 07-08-2019, 05:39 PM   #1
70CHEVYBB
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New vintage usa highbeam/engine light prblem

Just in stalled a NVU performance black gauge kit. two problems 1) hight beam light stays on when lights are turned on, it does get btighter when the high beams are turned on. 2) check engine light stays on all the time. i have checked for codes and all are cleared. this is a 5.3 with psi harness and computer. i also installed a new AAW harness for the truck. the brown engine light wire from the pcm goes to the the black wire on the light and the red wire goes to power. the high beam light black wire goes to ground and the red wire is hooked to the hi beam wire in the AAW harness. i called NVU and have no fix for the high beam light problem and said I need to use a relay on the check engine light . Any thought on this???
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Old 07-09-2019, 06:36 PM   #2
Andy4639
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Thumbs up Re: New vintage usa highbeam/engine light prblem

I'm not 100% sure but the wire coming from the PCM should be a ground wire.

The high beam wire on the dimmer should go as you stated. I would check your dash and make sure it's grounded good. On factory dashes anytime the turn signals are high beam lights stay on it's a dash ground problem.
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
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Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
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Old 07-09-2019, 06:51 PM   #3
70CHEVYBB
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Re: New vintage usa highbeam/engine light prblem

yes the pcm wire is ground. i ran it to the black wire to the light and the red wire to ignition. as soon as i turn the key on the light come on
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Old 07-13-2019, 10:23 PM   #4
Andy4639
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Talking Re: New vintage usa highbeam/engine light prblem

Quote:
Originally Posted by 70CHEVYBB View Post
yes the pcm wire is ground. i ran it to the black wire to the light and the red wire to ignition. as soon as i turn the key on the light come on
That's correct the hot wire is hot when key is on because of the ground wire.

Your gonna have to figure out the ECU wiring for the check engine light to trigger it and tie into it, not straight to a hot wire.
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71


Upstate SC GM Truck Club
2013,14 and 2016 Hot Rod Pour Tour


http://upstategmtrucks.com/



Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
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