3157 LED Bulbs
5th Wheeling
Joined: Apr 2010
Posts: 36
Likes: 10
From: Sarnia, Ontario area
3157 light bulb replacement
LEDs are going to give you fits if you don't know the following
LEDs are much lower resistance than standard incandescent bulbs. Less resistant means they will flash fast known as hyperflash
You need to use Forscan to turn off the bulb out function for each one.
That stops the hyper flash.
When you install LED buy the better brands. Cheap ones have poor solder jobs and will fail
LEDs need to be installed in proper polarity or the Led won't light. Just turn it around in the socket
RoadrunnerII
Last edited by RoadrunnerII; Nov 14, 2025 at 07:20 AM.
Cargo Master
Joined: Dec 2021
Posts: 2,372
Likes: 992
From: Chambersburg, PA
You can also buy loading or shunt resistors to fool the PCM with a higher load. I, like you, opted to just use the standard incandescent bulbs. The biggest difference in my opinion is having clean, clear lenses.
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