Another dilemma for the electrical gurus...

Discussion in '7.3L Powerstroke Diesels' started by unclehoser, Mar 27, 2017.

  1. unclehoser

    unclehoser Old dog, new tricks Supporting Member

    Age:
    62
    Posts:
    85
    Likes Received:
    10
    Joined:
    Sep 21, 2016
    Location:
    Arizona
    Then maybe I'll take it out to East BF in the desert and shoot at it with the AR-15 from about 100 yards...Party time!!! (Just kidding...I would never do that...)
     
  2. 79jasper

    79jasper Chickenhawk

    Age:
    25
    Posts:
    13,869
    Likes Received:
    401
    Joined:
    Oct 13, 2012
    Location:
    Collinsville, Oklahoma
    Shooting it may not set it off. But a 12v battery will. Jyst search the YouTube's, many videos of stuff being launched. Lol

    Sent from my SM-G892A using Tapatalk
     
  3. madpogue

    madpogue Full Access Member

    Posts:
    1,607
    Likes Received:
    114
    Joined:
    Mar 16, 2009
    Location:
    Madison, WI USA
    How did you determine it was the switch, and not a sticking relay?

    For, er, alternative airbag deployment, visit Davidsfarm on youtube.
     
  4. unclehoser

    unclehoser Old dog, new tricks Supporting Member

    Age:
    62
    Posts:
    85
    Likes Received:
    10
    Joined:
    Sep 21, 2016
    Location:
    Arizona
    I was able to "trick" the horn into sticking & unsticking by manually manipulating the switch at the airbag. It felt completely worn out, with no tactile "feel" or spring-back, like other Ford trucks of that vintage that I have owned.

    From what I've been able to find during research, the horn relay is embedded permanently in the main fuse panel, and is an item that rarely fails. I'll try the airbag module first, as opposed to replacing the entire fuse panel!
     
  5. madpogue

    madpogue Full Access Member

    Posts:
    1,607
    Likes Received:
    114
    Joined:
    Mar 16, 2009
    Location:
    Madison, WI USA
    Yeah, sounds like something inside the pad that provides spring tension has gone flat. Sounds $$$$-y....

    Eek, thanks for the reminder of why I hope never to own a motor vehicle made in this century.....
     
    Last edited: Nov 14, 2017
  6. 79jasper

    79jasper Chickenhawk

    Age:
    25
    Posts:
    13,869
    Likes Received:
    401
    Joined:
    Oct 13, 2012
    Location:
    Collinsville, Oklahoma
    Yep. It's technically not serviceable. Lol

    Sent from my SM-G892A using Tapatalk
     
  7. unclehoser

    unclehoser Old dog, new tricks Supporting Member

    Age:
    62
    Posts:
    85
    Likes Received:
    10
    Joined:
    Sep 21, 2016
    Location:
    Arizona
    And that, gentlemen, is exactly why I'm trying the $50 used airbag assembly before anything else! Those dollar signs have a tendency to add up, not to mention piss me off!!!

    Cheers!
    Dave
     
  8. unclehoser

    unclehoser Old dog, new tricks Supporting Member

    Age:
    62
    Posts:
    85
    Likes Received:
    10
    Joined:
    Sep 21, 2016
    Location:
    Arizona
    Update...
    All is well! Everything works as it should. The $50 used part had a LOT more 'springiness' in the horn pad.

    In a moment of malt-barley-beverage-fueled madness, I decided to risk opening the old one up...curiosity killed the cat, right??? Fortunately, there were no explosions, and I discovered what actually makes the horn work! There's a membrane switch in there about the same shape as a football, and about half the size. It was completely flat, no tactile response, no 'spring-back' as there should be (I've dealt with plenty of equipment that uses membrane switches, and they're like pushing on a stiff bubble that wants to be a bubble!).

    Factory part was $830. Saved a buck or two...now, it's just about finding a flat spot in the desert to 'dispose' of the old one...maybe see how high I can launch (insert object here!).

    Cheers!
     
    Thewespaul likes this.

Share This Page