Put in some piaa horns, question on relays from my mechanic?

Henry Bowman

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Dec 20, 2021
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Find out what relay to buy and I’ll install it. It’s a simple wiring job with only 3 connections, 1 to ground, 1 to the source and 1 to hot. There’s different relays out there for different things.

"Not sure it matters but keep in mind the Norton is positive ground in case the relay has to be specific on positive versus negative ground. I don’t think so but I honestly don’t know."

Do you gents have any suggestions for us?
What relay do you use?
it's a 1973, 750 if that helps...
Thanks in advance for your help!
 
Last edited:
Henry Bowman said:
Find out what relay to buy and I’ll install it. It’s a simple wiring job with only 3 connections, 1 to ground, 1 to the source and 1 to hot. There’s different relays out there for different things.

"Not sure it matters but keep in mind the Norton is positive ground in case the relay has to be specific on positive versus negative ground. I don’t think so but I honestly don’t know."

Do you gents have any suggestions for us?
What relay do you use?
it's a 1973, 750 if that helps...
Thanks in advance for your help!
Click to expand...
The standard Lucas RA6 relay is isolated from the case so can be positive or negative ground. In Triumph motorcycles with two horns the horn has a common, control, and two horn connections. The same relay is used in many vintage British cars for a variety of purposes. They are readily available.
 
marshg246 said:
The standard Lucas RA6 relay is isolated from the case so can be positive or negative ground. In Triumph motorcycles with two horns the horn has a common, control, and two horn connections. The same relay is used in many vintage British cars for a variety of purposes. They are readily available.
Click to expand...
Thank you sir!
 
Should not make any difference if an older type analog relay as you only need power through the coil, either direction to close the contacts. Many come with a small diagram on packaging or on the casing to show what terminal does what.
 
relays.JPG

I have very good luck with these relays. I use them on all my bikes, these are on my GL-1000.
 
Thanks guys! I and my mechanic buddy appreciate the assist.
He says that unlike the stock bucket of bees, the new PIAA snails sound like a train horn and are loud enough to blow womans clothes clean off!
 
rweb said:
Whare do you get these relays with wire end plug connectors ? Can find the relay but not the wire harness end that plugs into it.
Click to expand...

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Deets55 said:

Motorcycle Terminals, Connectors, and Wiring Accessories

Cycle Terminal - We have Your wiring Needs. OEM Style Japanese Motorcycle Wiring Terminals and Connectors for Yamaha, Kawasaki, Suzuki and Honda Motorcycles, from the 60’s to the 90’s. Motorcycle electric products and accessories, Motorcycle Fuse Box's, Bullet Terminals, Spade Terminals and...
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Click to expand...
Thanks, I've been looking for something like this to get away from the Bosch 5 pin relays .👍
 
On a side note, Cycle terminal also offers nice 3 and 4 circuit mini blade fuse boxes.

They are very well made and are super compact.
 
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