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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Flasher Relay

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Old Mar 18, 2025 | 05:55 AM
  #1  
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Flasher Relay

Hi All,
My indicators on my '86 F100 decided they didn't want to work anymore today.
I checked the fuse (#5 according to google) and then moved onto the relay/flasher. There is a space on the fuse block for the relay, but no relay (see photo).
I know there were many layout changes through the Bullnose run, does anyone have any idea where else I should look? It is an Ex ambulance and the wiring is an absolute nightmare!

 
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Old Mar 18, 2025 | 07:01 AM
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There should be 2 flashers, 1 out front you are showing that I believe is for the turn signals.
Then if you slip the fuse box off it's mount on the back side there is another flasher for the 4 ways.
Most of the time you can swap the 2 flashers for testing. I would get a new flasher and pop it in the front side and see what happens.

Then again being a ex-meat wagon and the wiring the way you said it is you may need to dig deeper?
How do the brake lights work with and without the turn signals on?
Could it be a bad switch?
Good luck
Dave ----
 
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Old Mar 18, 2025 | 08:45 AM
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In the factory configuration, two flashers were installed. A turn signal flasher was installed on the aft side of the fuse panel, facing the driver. Somewhat hidden on the other side, facing the firewall, was the 4-way hazards flasher. More details here:

https://www.ford-trucks.com/forums/1...ing-guide.html


No idea about any changes made for the ambulance configuration.
 
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