Horn

General discussion about our beloved Tercel 4WD cars
Mickey_D
Top Notch Member
Posts: 309
Joined: Mon Feb 13, 2006 6:40 am
Location: Salt Lake City, Utah

Post by Mickey_D »

Actually, I probably could.

<---- 7yrs as a Navy Electronics Technician and MANY years of doing electronics myself.

What part of the system do you need a map for?
1986 Tercel Wagon 4X4 SR5 (sold to splatterdog).

A bullet may have your name on it, but shrapnel is addressed, "To whom it may concern"!!
Typrus
Highest Ranking Member
Posts: 3049
Joined: Sat Oct 23, 2004 4:43 pm
Location: Colorado

Post by Typrus »

But all the horn contact does is ground the horn. Power runs straight to a fuse that runs to battery power. If there is no ground, it won't sound.. So then how does one do it?

BTW, the FIAMM horns are 10Amps a piece.
RIP 10-07- 1984 Toyota Tercel SR5 4wd Wagen 6 speed

RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed

1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed

1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew
Gasoline Fumes
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Posts: 692
Joined: Thu Apr 01, 2004 11:54 pm
Location: New York State

Post by Gasoline Fumes »

One side of the relay coil would go to the horn switch. The other side would go to constant 12v or switched with the ignition if you want.

One side of the relay contacts would go to ground and the other to the horn. And you can run a big (fused) power wire from the battery to your horn(s).

Or you could rewire the horn to have constant ground and switched power like in Mickey_D's drawing.
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