Fog Light Comes on When Turning

[jdomke1]

Full disclosure, I just bought this truck a PO installed a upgraded front bumper. From all appearances, the factory fogs are still mounted in original location.
Here’s my issue the dealer can’t figure out:
At night, when turning steering wheel left 90 degrees, the left fog light comes on. It does the same thing when putting on the left turn signal. The right side never does either of the above.
I can’t find in the owners manual. One might caulk it up to the new bumper but I can understand how this light knows how to turn on when steering or using factory turn signal. Either the right side is broken or the left shouldn’t do this.
Any ideas? Thank you.

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[Richard320]

It sounds like it's working as designed but the right side is broken. Try turning on the foglamps and see if they both work. And verify that the turn signal works, too. And then hunt for the ground. Bizarre electrical behavior often turns out to be a bad ground, so the current finds a different path to follow.

 

[mikeru82]

These trucks use the fog lights as cornering lights. They are designed to turn on when you turn the wheel. The left fog should come on when you turn left, and the right fog should light up when turning right. Of course, if you turn the fogs on they just operate like normal fog lights.

 

[piening2150]

^^What they said. The fog lights act as cornering lamps when turning (if they're off). Left side is working as intended. Right side seems to be broken.

 

[jmt8706]

Have you traced the wiring for the lightbar? Sometimes peoples connections or splices aren't too great.

 

[jdomke1]

I’m replacing the bumper today so I can run down the wire. What actually was happening, being in front of the truck to see it, when left the left fog and light bar came on. When right the right fog only comes on. It’s so dim I never noticed the right and left so bright I never considered it was the bar too. Definitely messed up wiring. Disappointed the Ram dealer had no clue what I was talking about regarding lights coming on when turning. Can’t find in owners manual either.


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[Idahoktm]

I’m replacing the bumper today so I can run down the wire. What actually was happening, being in front of the truck to see it, when left the left fog and light bar came on. When right the right fog only comes on. It’s so dim I never noticed the right and left so bright I never considered it was the bar too. Definitely messed up wiring. Disappointed the Ram dealer had no clue what I was talking about regarding lights coming on when turning. Can’t find in owners manual either.


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It's in the owner's manual on the page that describes the turn signals.

 

[piening2150]

So whoever added the light bar just tapped the left fog for power (or relay trigger). Easy fix. Just put the light bar on its own separate power & switch.

 

[Benevolent one]

I’ve noticed this brought up in other threads, and is a concern for me. Aftermarket lights tapped into factory fog light harness coming on for cornering. I didn’t realize it was the fog lights acting as corner lights until after I put a winch tray bumper on with spot and flood lights. Now I’m concerned about blinding people making turns. I saw some chatter other places on web (bimmer/vw) that this feature can be disabled through OBD tool. Anyone know if this may be possible with FCA? Really want to keep clean look of using factory harness and button instead of wiring a switch into cab

 

[HSKR R/T]

I’ve noticed this brought up in other threads, and is a concern for me. Aftermarket lights tapped into factory fog light harness coming on for cornering. I didn’t realize it was the fog lights acting as corner lights until after I put a winch tray bumper on with spot and flood lights. Now I’m concerned about blinding people making turns. I saw some chatter other places on web (bimmer/vw) that this feature can be disabled through OBD tool. Anyone know if this may be possible with FCA? Really want to keep clean look of using factory harness and button instead of wiring a switch into cab

Or just don't use janky wiring by tapping into the fog light for auxiliary lighting.

 

[Richard320]

I’ve noticed this brought up in other threads, and is a concern for me. Aftermarket lights tapped into factory fog light harness coming on for cornering. I didn’t realize it was the fog lights acting as corner lights until after I put a winch tray bumper on with spot and flood lights. Now I’m concerned about blinding people making turns. I saw some chatter other places on web (bimmer/vw) that this feature can be disabled through OBD tool. Anyone know if this may be possible with FCA? Really want to keep clean look of using factory harness and button instead of wiring a switch into cab

Looking to add AUX switches? Using the homelink buttons to control Lightbars DIY HOW TO for under $20.

So I just added MicTuning C2 rocklights under my truck and I didn't want to drill a hole on a panel in the interior of the truck. So I purchased a eMylo DC 12V 1 Channel 433Mhz RF Wireless Relay Remote Control Momentary Light Switch Self-lock Transmitter with Receiver for Home Use Learn more...

5thgenrams.com

 

[jdomke1]

I’ve noticed this brought up in other threads, and is a concern for me. Aftermarket lights tapped into factory fog light harness coming on for cornering. I didn’t realize it was the fog lights acting as corner lights until after I put a winch tray bumper on with spot and flood lights. Now I’m concerned about blinding people making turns. I saw some chatter other places on web (bimmer/vw) that this feature can be disabled through OBD tool. Anyone know if this may be possible with FCA? Really want to keep clean look of using factory harness and button instead of wiring a switch into cab

The crazy thing for me was the local big time dealer having no clue what I was taking about. I just put in a separate switch to turn them on.


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[Lize]

Look in the menus for:
Settings->Lights->Steering detected lights