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  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

Horn Partially on all the Time

  • Thread starter Thread starter geordie
  • Start date Start date Jan 5, 2012
G

geordie

Founding Member
May 10, 2002
576
2
19
Jan 5, 2012
#1
  • Jan 5, 2012
  • #1
Started my '65 Coupe recently and the horn was on, faintly, all the time. I disconnected the horn units themselves. I have a Grant wheel and adapter and the horn has always been very sensitive, breath on it and it's on. Any thought's what's causing this, bad horn button, weak springs, etc.
 
J

j69302

Active Member
Jan 31, 2006
325
1
29
Jan 5, 2012
#2
  • Jan 5, 2012
  • #2
Make sure the wire terminals are not grounding out on the steering wheel nut or the steering wheel, or horn button itself.. If they are, you should be able to tell by popping the horn button off and looking.

By design, it is easy for this type of setup to ground out and sound the horn.

Make sure you disconnect the negative lead on the battery first, as the horn wiring is always hot.
 

rbohm

Founding Member
Apr 12, 2002
6,698
550
204
tucson,az
Jan 5, 2012
#3
  • Jan 5, 2012
  • #3
yep, the cheap grant install kits usually have weak springs, and the clearance between the horn button and the steering wheel is rather small. i solved the issue on one grant wheel install by using a heavier spring. you have to be careful though as too heavy a spring will launch the horn button, usually at inopportune times.
 
G

geordie

Founding Member
May 10, 2002
576
2
19
Jan 6, 2012
#4
  • Jan 6, 2012
  • #4
j69302 said:
Make sure the wire terminals are not grounding out on the steering wheel nut or the steering wheel, or horn button itself.. If they are, you should be able to tell by popping the horn button off and looking.

By design, it is easy for this type of setup to ground out and sound the horn.

Make sure you disconnect the negative lead on the battery first, as the horn wiring is always hot.
Click to expand...
Thanks guys, how would I check the for grounding of the horn button.
 
J

j69302

Active Member
Jan 31, 2006
325
1
29
Jan 6, 2012
#5
  • Jan 6, 2012
  • #5
geordie said:
Thanks guys, how would I check the for grounding of the horn button.
Click to expand...
you would see the wire leads touching something else that is metal, such as the steering wheel nut, or horn button.
 
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