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01-13-2024, 01:43 PM | #1 |
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Join Date: Sep 2018
Location: Sumner, WA
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Parking light/side marker issue LED bulbs
I have a 1971 c10 and when my parking lights and side markers are standard incandescent bulbs everything works normal. However, when I replace my parking light bulbs with the equivalent LED bulbs my side markers no longer illuminate and my turn signals are illuminated solid on my dash. Is there a quick fix to this? I'm guessing the LED bulbs don't offer enough resistance and the truck thinks a bulb is burnt out or missing.
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01-13-2024, 03:57 PM | #2 |
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Location: TN.
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Re: Parking light/side marker issue LED bulbs
This video below should help you.
Some of the LED bulb types need to use different flasher. Other (My Nephews Furd) wiring systems I have had to install thesein the link below. Link. https://www.superbrightleds.com/led-...ping%20Adgroup
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
01-13-2024, 06:55 PM | #3 | |
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Re: Parking light/side marker issue LED bulbs
Quote:
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
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01-14-2024, 01:08 PM | #4 |
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Re: Parking light/side marker issue LED bulbs
Here is a diagram showing the wiring of the marker and turn signal lights.
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
01-14-2024, 02:03 PM | #5 |
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Re: Parking light/side marker issue LED bulbs
The previous diagram posted by VetteVet is for 69-70
Here is the one for 71-72
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
01-14-2024, 02:28 PM | #6 |
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Re: Parking light/side marker issue LED bulbs
Thanks Richard I didn't look close enough before I posted.
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
01-14-2024, 09:28 PM | #7 |
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Re: Parking light/side marker issue LED bulbs
Having both diagrams is a good thing.
I did a crude drawing of installing a Bosch 12v relay in the system. Apologize for my bad paint skills. Doing this should allow led's in both turn and marker locations and keep the marker alternate flashing with front turn. A relay would be needed on each marker.
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
03-31-2024, 07:00 PM | #8 |
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Re: Parking light/side marker issue LED bulbs
What about adding diodes and a resistor like this? (stolen screen shot from a jeep website)
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04-01-2024, 01:40 AM | #9 | |
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Re: Parking light/side marker issue LED bulbs
Quote:
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 Last edited by Richard; 04-01-2024 at 01:46 AM. |
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04-01-2024, 11:57 AM | #10 | |
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Re: Parking light/side marker issue LED bulbs
Quote:
So the LED would receive (resisted) power via the DLR and go to ground. Then when the turn signal is applied the LED receives full power via the other wire and blinks due to the flasher. The above drawing/schematic was borrowed from a Jeep website dealing with the same OEM floating ground setup - so i know it works . Just offering another/simpler solution. |
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04-02-2024, 01:20 AM | #11 | |
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Re: Parking light/side marker issue LED bulbs
Quote:
The wire from the marker in the chevy is the ground from the marker, not a hot. Maybe the jeep configuration is different. Edit: Not saying it does not work- I just want to understand why adding the resistor and diode makes it work. Load from marker circuit sees the resistor and reduces amperage through the led so it can ground? If I understand I can apply knowledge elsewhere. Kind of how I learn, even now at the age I am.
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 Last edited by Richard; 04-02-2024 at 02:41 AM. |
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04-02-2024, 12:38 PM | #12 | |
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Join Date: Mar 2007
Location: Oakland, Ca
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Re: Parking light/side marker issue LED bulbs
Quote:
Then the bottom drawing has both the power wires merging (after the diodes/resistor) and going trough 1 of those cut wires to the bulb. The other wire coming off the bulb then becomes a ground wire - you need to ground it to the chassis. So you need to cut your stock harness, alter how the power wires flow power and add a ground. Alternatively, because i don't want to cut my harness/wires, I will use 194 male/female bulb sockets to create a plug and play jumper wire like the image below. Last edited by SeventyOne; 04-02-2024 at 05:22 PM. |
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