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Jeremy, Certified Diesel Technician/Electrician
Category: Ford
Satisfied Customers: 3221
Experience:  ASE, NATEF Engines and Electrical certified, EPA 608/609
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Having problems with my 2006 6.0 power stoke diesel truck,

Customer Question

having problems with my 2006 6.0 power stoke diesel truck, the turn signals are not working however the brake and flashers are. pin pointed the problem now but still hasnt solved it replaced the flasher relay and without starting the truck (just opening the key the turns signals work however as soon as you crank it the really burns up weird part is that the flasher still work though. tried two relays one from autolite and the second one from FORD. have look at all the other fuses and everything seems fine. what could it be?
Submitted: 1 year ago.
Category: Ford
Expert:  Jeremy replied 1 year ago.

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

Are any of the light burned out?

If you have a trailer tow package, look in the trailer hook up. Does it have corrosion or look wet? If so, spray electrical contact cleaner or brake cleaner (let it dry out if using brake cleaner) and then put dielectric grease in there. See if the problem still goes on.

When the lights flash fast, it usually means a bulb is burnt out or there is a issue with the trailer plug shorting from moisture. The flasher gets a different ohm reading and will flash faster because of the open/short in the circuit.

Give these a look and let me know what you find.

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Customer: replied 1 year ago.
none of the bulbs are burnt out. Was wondering that myself to but when i tried it without cranking (starting the truck) with the new flasher relay they worked perfectly fine. i will try cleaning the tow hookup to see if there is any problem there in the morning. I appreciate it and ill let you know in the morning to see if that hopefully fixed the problem. Also do you know the locations of the grounds that might be associated with the turning signals or type of electrical groundThank you *****
Expert:  Jeremy replied 1 year ago.

They ground out at the GEM ground stud in the cab, left side of driver, behind the kick panel where the parking brake is.

Exterior they ground at the front frame for the front lights, both corners and the rear grounds on the cross member, right side where is comes to the bumper.

These are the ones I know of.

Expert:  Jeremy replied 1 year ago.

With it acting up when you start the vehicle, It will be in the trailer socket or the brake controller since they don;t power until you start the vehicle. The ABS or "auxiliary" circuit as it is called. It is usually the blue wire that goes to the trailer 7 way plug.