Hi Frank,
Could it be that the voltage feed through the car's wiring to the horn is
dropping, only under load due to a poor connection or corrosion - or that
the ground circuit to the horn button has the same type of problem.
To check the positive feed to the horn I would hook the horn up to the
positive harness feed and run a jumper wire from the other horn terminal to
battery ground. Hook up a volt meter to the + side of the horn to ground
and note voltage drop as the horn ground is touched on the battery. If the
voltage reading drops significantly, there is something wrong with the +
feed to the horn or the circuit is not heavy enough for this particular
horn. If there is no drop and the horn does not honk, there is something
wrong with the horn.
If the + feed and the horn is OK, all but the horn switch itself can be
checked by hooking up the horn to the wiring harness + and - and monitoring
the voltage on the ground wire as near to the horn switch as possible.
When the horn switch is not depressed, you should read battery voltage.
When the horn switch is depressed, you should read 0 volts. If it reads
more than 0 volts, then there is a problem with the horn contact.
Hope this helps,
Les
The feed to the horn can be checked by hooking up
At 09:15 PM 2/27/98 -0500, you wrote:
>Lucas strikes again!
>
>Maybe an electrical engineer can explain this one!
>
>60 Sprite/ Horn
>
>The horn quite on my Sprite, I picked up a junk yard horn, 12 volts, 2
>terminals.
>Tested the horn with 2 wires to the battery, horn goes Beep Beep.
>Hooked up horn to cars harness, no beep beep.
>Checked button, all is good.
>Checked for 12 volts where wires hook to horn, 12.8 volts, same as battery.
>
>Checked ground from horn push to horn terminal, all was good.
>Hooked up test light, pushed horn button, test light lit...
>Re-checked horn, it works when hooked to battery.
>hooked up horn and test light to horn terminals, light lit, horn did not
>beep.
>
>Now I am confused, I know the horn works, I have 12 volts (checked with
>meter) at the horn terminals and the ground is completed when the button is
>pushed.
>It should work. It does not.
>My son said "Lucas Dad" that was his answer.
>Anybody else care to give a more reasonable answer?
>
>--
>Frank Clarici
>Seeing all of you at Sprite Rush 98
>For more info on Sprite Rush, the 40th anniversery of the Sprite
>Check out my home page http://www.exit109.com/~spritenut
>------------------------------------------------------------------
>
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