its for the horn for the SV32 MODEL

 

You might check the other relays in the car as Toyota may use the same relay some place else. Then swap in this relays.

Do you have access to an ohmmeter?

A three prong relay is different from a 4 prong (relay external connection blade) in that is connects one prong to both a terminal of relay solenoid and a terminal of the relay on/off switch (call this prong A). This prong would typically be the powered side of the relay as in +12v applied to it or here from the horn switch. The other two prongs are connected to either the other side of the relay solenoid (prong B) or other side of the switch (prong C).

Assume the relay switch is normally open as is in off.

Find a 4 prong relay diagram on the internet. Then make a diagram of this but connect one terminal of the solenoid to the terminal of the switch having the arm on it (looks like a swinging door) and call this prong A.

For Toyota prong A may be the independent vertical prong on the other side of the relay while the other 2 prongs are located horizontally.

Look on the relay to determine of the relay prongs (blades) are numbered. If so 2 may be prong A, 1 prong C and 3 prong B

If you have 12v+ you can try to power the relay. Here connect the power wires to say prong A and prong B. If you hear the relay click these connections are for the relay solenoid. Prong C would then be the other terminal of the switch. When the solenoid is closed then prong C would now have 12v.

If no click then move from B to C.