I towed my friends car hauler yesterday for a short distance for him. I had no turn signals or 4 way flasher while towing. After dropping off the trailer still no signals or 4way flasher. I parked and checked fuses all were good and signals started to work. But still no 4ways. Any thoughts on what to look for. Never had this before. I have blown a fuse before and always been able to find and fix. Thanks!!

 

There are some larger fuses in the engine bay fuse boxes that could have blown. After towing a rented U-Haul trailer, I came back with no brake lights - an engine bay fuse had blown (40a I believe).

Check the owners manual and look at the fuses under the hood, driver side, not too far from the firewall.

 

Thanks! I forgot about those!

 

Let us know if something is blown...got me curious now...

 

I'll check later. The thing that got me was I didnt have anything first then the signals came back but the 4way didnt.

 

...that IS weird. I thought I read somewhere that the turns and hazards were connected by something (relay, etc.)...maybe that's on it's way out...

 

This has happened on my 6.0 before and the fuse that has blown is NOT the one you would expect. It is in no way identified in the owners manual as controlling turn signals, hazards, or the trailer plug, if I recall. I've blown it twice and both times it took me about ten tries to find the blown one. I'd recommend you keep searching. Use a multimeter to check the fuses as you go. Good luck. Sorry I can't remember which one. It's ten or fifteen amps if I recall (I believe ten but not sure).

 

On an 05 Excursion, the hazards are powered by ALWAYS HOT fuse F2. The turn signals are powered by HOT IN RUN OR START fuse F18. Both go to the flasher relay located in Aux Relay Box #3 which is located up under the dash on the driver's side.

It's important to identify the YEAR of your truck, the systems are COMPLETELY different from 00 to 05, for example.

 

Thanks I will look at it again today. I was messing around last night and couldnt figure it out. I purchased a flasher that is somewhere under the dash that I was gonna replace if all else failed. Thanks again!!

 

I got thru about half of the fuses before my hand got too cold to continue no luck yet

 

Why are you wasting time trying to check every fuse when I told you the only two that are involved?

If those two fuses are good and there's power when it's supposed to be there, you're finished checking fuses, move on to the next step.

 

Just got around to deal with this again. I got a flasher from Autozone and 4ways work but it wont stop clicking. I ordered one from Ford and will get it tomorrow.

 

Common problem with the aftermarket flasher relays lately.

 

That's what I figured. I was a little shocked that the local ford dealer didn't have one but one more day isn't going to make a difference at this point