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Jeremy
Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 3304
Experience:  ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician
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I have a 2007 Freightliner Columbia that the right signal

Customer Question

I have a 2007 Freightliner Columbia that the right signal stays on when if the truck is running or not.
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Jeremy replied 1 year ago.

My name is ***** ***** I will assist you.

If you turn the left turn signal on, does the right continue to keep flashing? A lot of times the turn signal switch will go bad and cause this to happen, so I would look there first.

Second spot to check would be the relay/flasher to make sure it isn't malfunctioning and causing this.

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Jeremy

Customer: replied 1 year ago.
The right blinker stays on no matter what without a flash, even on the dash. I have to use the battery disconnect to avoid a complete drain.
Expert:  Jeremy replied 1 year ago.

If you remove the turn signa; switch, does it continue to flash? This will help identify if the issue is due to a back-feed or short to power in that circuit.

Provide full 13 digit VIN and when I return from my road call, I will pull up the doagram for that circuit for you.

Thanks.

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