A new question is answered every 9 seconds

I had a turn signal / flasher problem with my 97 ford f150

This answer was rated:

I had a turn signal / flasher problem with my 97 ford f150 and found some blown fuses for the trailer tow and flashers but I am still having problems resolving the turn signals. Is there a specific fuse or relay to check?
fuse 1 and 8 under hood number 18 interior fuse box
Customer: replied 7 years ago.

My op manual must be different then yours says that



under hood

#1 is 20A fuse Fuel pump

#8 is Horn relay


inside fuse box

#18 is 10A fuse right lo beam


can you give the name for these fuses you listed

Customer: replied 7 years ago.

these are some of the fuses I already replaced


under hood

#24 25A fuse power point

#34 20A fuse trailer tow lamps


#5 20A in the engine fuse module


inside fuse box

#2 15A fuse emergency flasher

try number 23 interior fuse what does yours say?


the number 1 is trailor

number 8 is for the multifunction switch


number 18 is all lights and park relay

Customer: replied 7 years ago.

#23 interior fuse in my book is a 5A fuse insrtument panel illumination



I don't have any fuse in my book that is listed as a multifunction switch

or all lights and park relay.


how do you test a relay?

easiest way is to swap with another other than that you have to flip over the box and see if you are getting power.


Check the light blue wire at the turn signal switch and see if it pulses voltage when you press the turn signal to left or right?

Customer: replied 7 years ago.
Is the switch in the steering column? do i need to pull the bottom cover on the column?
just pull the cover around the column and remove the 2 screws holding the switch.
Customer: replied 7 years ago.

Is it a solid light blue or a light blue with orage srtipe? I don't have my voltmeter so i used my 12 volt light tester. the wires to the flasher caused it to flash.


I checked the solid light blue and got nothing with turn but worked with flashers so i think it is a flasher wire.


the light blue with orange stripe gave me a steady very dim light with turn on or off

solid light blue it should pulse turn and the white with red stripe should pulse hazard.
Customer: replied 7 years ago.

there were about four wires that would pulse with the hazard and none with the turn


The plug that has the solid light blue also includes the white w/red stripe (you said is the flasher wire), white w/blue, green w/white, sloid blue all these wires except a sold green one pulse with flashers


so I guess your answer is to replace the switch?


no i would check the flasher relay located on the passenger side of the dash under the access panel on the top of the dash toward middle. there will be a relay box one for blower and one for flasher swap and see if they work.
Customer: replied 7 years ago.
there is only one relay in that box. It is positioned in the top spot towards the engine side

check behind the metal brace and see if there isnt another relay box there


Tim, Ford Technician
Category: Ford
Satisfied Customers: 3580
Experience: Ford Senior Master tech, ASE certified
Tim and 8 other Ford Specialists are ready to help you
Customer: replied 7 years ago.

I found a diagram online and it showes the blower / flasher under the drivers dash above the trailer brake control plug. There is a larger Blue relay and a smaller black relay


the one located under the passenger dash on this diagram says RPO relay block?


is this diagram correct for my 97 f150?



Customer: replied 7 years ago.

OH also I did recheck the one under pass dash could only see the one relay box. It has a small gray relay

yes yours is correct It seems my manual has a lot of mis info I will opt out and see if any one else can further assist you.
Customer: replied 7 years ago.
ok thanks
Customer: replied 7 years ago.

Turn signals are now working. I reinstalled the turn signal swicth and It began working agian. Maybe a bad connection with steering column which doesn't make since cause it was working fine before I blew out the fuses.


Also figured out that the fuses and relays in my Op manual are in the same position but are numbered differently then the OP maual I found online at https://www.fleet.ford.com/maintenance/owners_manuals/default.asp


thanks your advice did end up helping in the long run






you are very welcome
Ask Tim Your Own Question
Tim, Ford Technician
Category: Ford
Satisfied Customers: 3580
Experience:  Ford Senior Master tech, ASE certified
Type Your Ford Question Here...
Tim is online now
How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

What Customers are Saying:

  • AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on. Rich D USA
< Previous | Next >
  • AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on. Rich D USA
  • Because of your expertise, you armed me with enough ammunition to win the battle with the dealer. They are installing a fuel filter and fuel pump at no charge to me. Molly USA
  • I needed help with my car on Saturday morning....got a response in 5 minutes, and it was the perfect solution. Thanks again to your service. Jason V. Kirkland, WA
  • I do know, after going though this with JustAnswer, that I can somewhat trust my mechanic but I will always contact you prior to going there. BR New Jersey
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

Meet The Experts:

  • Ron


    ASE Certified Technician

    Satisfied Customers:

    23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
< Last | Next >
  • http://ww2.justanswer.com/uploads/FO/fordguyu/2015-7-7_172556_onnieew.64x64.jpg Ron's Avatar


    ASE Certified Technician

    Satisfied Customers:

    23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka- Moose)'s Avatar

    Chris (aka- Moose)


    Satisfied Customers:

    16 years experience
  • http://ww2.justanswer.com/uploads/JM/jmcdo28/2012-2-23_01655_resized.64x64.jpg John Mc's Avatar

    John Mc

    Ford Technician

    Satisfied Customers:

    19 years Ford Lincoln Mercury experience
  • http://ww2.justanswer.com/uploads/wmarti7/2009-4-18_04332_Avatar.jpg Chuck's Avatar


    ASE Certified Technician

    Satisfied Customers:

    33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance
  • http://ww2.justanswer.com/uploads/BL/Bluegorilla/2012-6-21_16298_cam.64x64.JPG Cam's Avatar


    Journeyman Automotive Technician

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years Automotive experience.
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar


    ASE Certified Technician

    Satisfied Customers:

    12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.
  • http://ww2.justanswer.com/uploads/BA/baddad1/2014-4-1_23659_avatar.64x64.jpg Mike V.'s Avatar

    Mike V.

    Auto Service Technician

    Satisfied Customers:

    25 years experience on all makes and models, Licensed NYS Inspector.