79 F150 horn issues - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
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post #1 of 4 (permalink) Old 07-25-2013, 06:09 PM Thread Starter
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79 F150 horn issues

From what I have read and from studying the wiring diagrams, I do NOT have a horn relay. My truck did not come with cruise control. Sooo, I'm dealing with the yellow and yellow/blue wires from the steering harness.

Thinking I could do a quick and easy fix I just got a new center section for the steering wheel which is where the contacts are for my horn. It is doing the same thing.

What it does is, the horn will honk fine sometimes and sometimes it won't honk at all and sometimes it will go bip and then quit. I ran a direct hot from the battery to the horn and the horn honks fine. A friend helped me run a test light from the horn spade to ground and the light acts just like my horn does.

I unplugged the column harness connectors and looked and they look ok, nothing corroded, none of the connectors are pushed back.

I haven't pulled the entire steering wheel yet. That will have to wait until tomorrow afternoon. I'm thinking it could be the small connector from the horn terminals to the steering harness plug in? I noticed that my tilt wheel has quit tilting for some reason. I don't know if that has anything to do with this or not.

Anybody had this and if so how did you fix it?

1965 289 mustang fastback
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post #2 of 4 (permalink) Old 07-25-2013, 07:56 PM
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Re: 79 F150 horn issues

Quote:
Originally Posted by Hottarod View Post
I'm thinking it could be the small connector from the horn terminals to the steering harness plug in?

Anybody had this and if so how did you fix it?
You take off your wheel, you TIGHTEN the bolts that came loose, then you Dielectric grease the steering wheel contact and the issue will go away if your copper contact points isn't worn through.
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post #3 of 4 (permalink) Old 07-25-2013, 08:41 PM Thread Starter
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Re: 79 F150 horn issues

Maybe sometimes as I turn the steering wheel it affects this connection and either makes it not work or sometimes work? I'll find it I'm sure once I pull the steering wheel. I also noticed that my tilt steering does not work any more too.

I must be going senile. I 've worked on this part of the mustang including installing a new Grant wheel and replaced the turn signal switch and wiring harness twice on the F150 and I can not remember much about how those spring loaded pins and the die electric tracks work on that thing.

1965 289 mustang fastback

Last edited by Hottarod; 07-25-2013 at 08:45 PM.
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post #4 of 4 (permalink) Old 07-26-2013, 03:10 PM Thread Starter
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Re: 79 F150 horn issues

Well I found the problem and it appears to be another gift from China. This is the third turn signal switch that I have put on my truck in 7 years and it is now broke. The copper spring loaded ground pin that is made into the turn signal switch(touches the tracks on the back side of the steering wheel) has a brass terminal pressed onto the end and the ground wire is then crimped onto that terminal. The brass blade that is pressed into the copper pin broke right at the copper tip. It is so completely thin and flimsy that I am surprised it lasted this long. I see no way to fix this. You can't just put another terminal on it because it is pressed onto the copper pin as in pseudo permanent. The old Ford turn signal switch lasted for 30 years.

I am totally fed up with this parts from China crap.

1965 289 mustang fastback
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