Aftermarket suppliers for RELAYS?


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Sempai
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Aftermarket suppliers for RELAYS?

Postby Sempai » Sun Oct 27, 2013 11:31 am



I'm wondering if anyone knows of a supplier (other than Honda) for the various relays on our bikes. Specifically, my '94SE uses several Omron G8MS-H30, 12V/20A relays that run this and that and almost everything else...in fact, there are SEVEN of these relays in the relay box just aft of the fuse box.
My Wing lost its taillights and gauge lights thanks to a faulty #3 relay (tail,meter.) Honda wants $40 for this critter, my cost...I'm hoping to find a less expensive supply. The Omron website does not list the G8MS-H30 in their inventory, I sent them an email yesterday explaining my situation and asking if they might have a superseding part or what.

Anyone have any info on this? Point me in the right direction?


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Re: Aftermarket suppliers for RELAYS?

Postby SteveB123 » Sun Oct 27, 2013 12:22 pm

Pilot part number is: PL-RY1
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

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Re: Aftermarket suppliers for RELAYS?

Postby Sempai » Sun Oct 27, 2013 12:50 pm

Careful, the Pilot PL-RY1 is a 30A relay, the factory unit was rated for 20A. Excessive amperage to faulty parts elsewhere on the bike could generate melting wires/burnt plastics/fires and the like.
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Re: Aftermarket suppliers for RELAYS?

Postby SteveB123 » Sun Oct 27, 2013 3:14 pm

Sempai wrote:Careful, the Pilot PL-RY1 is a 30A relay, the factory unit was rated for 20A. Excessive amperage to faulty parts elsewhere on the bike could generate melting wires/burnt plastics/fires and the like.


Where will the excessive amperage come from?

A relay is a switch.
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Re: Aftermarket suppliers for RELAYS?

Postby WingAdmin » Sun Oct 27, 2013 4:08 pm

Sempai wrote:Careful, the Pilot PL-RY1 is a 30A relay, the factory unit was rated for 20A. Excessive amperage to faulty parts elsewhere on the bike could generate melting wires/burnt plastics/fires and the like.


It is perfectly safe to replace an existing relay with one rated for higher amperage. Think of an amperage rating as "safe for up to". A 20A relay is safe to handle current up to 20 amps. A 30A relay is safe to handle current up to 30 amps. The actual current flowing through the relay will still be limited by the load on the circuit, and by the fuse in the fuse block.

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Re: Aftermarket suppliers for RELAYS?

Postby Sempai » Sun Oct 27, 2013 5:03 pm

WingAdmin wrote:It is perfectly safe to replace an existing relay with one rated for higher amperage. Think of an amperage rating as "safe for up to". A 20A relay is safe to handle current up to 20 amps. A 30A relay is safe to handle current up to 30 amps. The actual current flowing through the relay will still be limited by the load on the circuit, and by the fuse in the fuse block.

I fear the worst. What about a charging system failure that sends excessive amperage through the system? If such a thing occurs, wouldn't the component(s) on the far side of the relay(s) experience the excessive amperage?
I'm curious now as to whatever correlation there may be between the 20A vs 30A relay and the "relay runs hot" issue I read in another thread in which the 30A was used??
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Re: Aftermarket suppliers for RELAYS?

Postby SteveB123 » Sun Oct 27, 2013 7:21 pm

Sempai wrote:
WingAdmin wrote:It is perfectly safe to replace an existing relay with one rated for higher amperage. Think of an amperage rating as "safe for up to". A 20A relay is safe to handle current up to 20 amps. A 30A relay is safe to handle current up to 30 amps. The actual current flowing through the relay will still be limited by the load on the circuit, and by the fuse in the fuse block.

I fear the worst. What about a charging system failure that sends excessive amperage through the system? If such a thing occurs, wouldn't the component(s) on the far side of the relay(s) experience the excessive amperage?


The fuse will blow.
The relay is just a switch with a rating; they're not current limiting ratings, they're continuous duty capacity ratings.
Are you installing this relay on an unfused circuit?
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Re: Aftermarket suppliers for RELAYS?

Postby robb » Sun Oct 27, 2013 7:24 pm

A 30 amp relay will not produce any more heat than a 20 amp relay. If there is a problem in the circuit both will blow the fuse at the same time. A 30 amp relay is totally acceptable for even a 1 amp load, but a 20 amp relay is not acceptable for a 30 amp load.


Relay packages are on ebay every month. I have bought a few used relay box with relays for $30-$40. Better than near $30 plus shipping for 1 relay from dealer.

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Re: Aftermarket suppliers for RELAYS?

Postby Sempai » Sun Oct 27, 2013 8:16 pm

Think I may need to really look into the wiring diagram as this stuff all makes sense, but at the same time.....

Somebody please tell me why, if they use a relay rated at 20A, did they use a fuse rated at only 15A??
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Re: Aftermarket suppliers for RELAYS?

Postby ct1500 » Sun Oct 27, 2013 8:36 pm

Sempai wrote:Think I may need to really look into the wiring diagram as this stuff all makes sense, but at the same time.....

Somebody please tell me why, if they use a relay rated at 20A, did they use a fuse rated at only 15A??


Looking at a wiring diagram will be of no help in understanding electrical theory.

The fuse is designed to be the weakest link in the chain and as such also protects the expensive relay which is an electro-mechanical device which will have a duty cycle and a probable predictable lifespan.
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Re: Aftermarket suppliers for RELAYS?

Postby WingAdmin » Mon Oct 28, 2013 9:13 pm

Sempai wrote:I fear the worst. What about a charging system failure that sends excessive amperage through the system? If such a thing occurs, wouldn't the component(s) on the far side of the relay(s) experience the excessive amperage?
I'm curious now as to whatever correlation there may be between the 20A vs 30A relay and the "relay runs hot" issue I read in another thread in which the 30A was used??


That's not the way electricity works. A charging system failure can't force more amperage (current) through the system than the system itself is demanding. You could have increased VOLTAGE, but the current being drawn through a circuit will be exactly the amount being drawn by the load.

Let's say you have a circuit with a fuse and a light on it. The fuse is rated for 20 amps, the light draws 15 amps. Even if the battery is capable of supplying 100 amps, the light will still only draw 15, because that's what its resistance allows (look up "Ohms Law"). If the light were to short out, it would suddenly draw much more than 15 amps. Instead of the wiring melting however, the fuse blows, which protects the wiring. This is why you should NEVER install a fuse rated higher than what the circuit is designed for.

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Re: Aftermarket suppliers for RELAYS?

Postby Sempai » Mon Oct 28, 2013 10:32 pm

WingAdmin wrote:That's not the way electricity works. A charging system failure can't force more amperage (current) through the system than the system itself is demanding. You could have increased VOLTAGE, but the current being drawn through a circuit will be exactly the amount being drawn by the load.

Let's say you have a circuit with a fuse and a light on it. The fuse is rated for 20 amps, the light draws 15 amps. Even if the battery is capable of supplying 100 amps, the light will still only draw 15, because that's what its resistance allows (look up "Ohms Law"). If the light were to short out, it would suddenly draw much more than 15 amps. Instead of the wiring melting however, the fuse blows, which protects the wiring. This is why you should NEVER install a fuse rated higher than what the circuit is designed for.


Thank you W.A. for this remedial description of how all that works...that really cleared up my confusion and I went ahead and ordered the PL-RY1 today.
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Re: Aftermarket suppliers for RELAYS?

Postby peppilepew » Tue Oct 29, 2013 7:02 am

For those in need of relays visit your local salvage yard. Chrysler products have banks of the relays that fit our bikes. Automotive relays are high quality diode suppressed. Any 97 up should do.

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Re: Aftermarket suppliers for RELAYS?

Postby cycletraderman » Thu Oct 31, 2013 9:29 am

Had a bad relay, and was highly offended by the cost of a new one. I bought an entire Goldwing wiring harness off of E-bay for $50 including.....all the fuses and relays! I now have a treasure trove of plugs, wire, and other items that are not sold separately by mother Honda!




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