I need to wire a relay into my wiring harness on my motorcycle. The tutorial I am following calls for a Pilot PL-RY1, which I can not find locally. Its 4 legs run 31-32 and 45-/-46 (open). My question is can I use a 85-86 and 30-/-87 relay. Do the numbers actually mean anything.
Those wiring schematics show that the two relays are similar and probably interchangeable. I say probably because the current rating for the main power circuit (45-46 on the pilot relay, and 87-30 on the other relay) may not be identical. Relays are categorized in terms of the number of volts needed across the coil to make it switch, and the current capacity of the main circuit. Your motorcycle certainly has a 12VDC supply to the relay coil, so the only other thing to determine is how much current will the main circuit see. Most generic automotive relays are either rated for 15A or 30A. What does your relay need to turn on?
Those wiring schematics show that the two relays are similar and probably interchangeable. I say probably because the current rating for the main power circuit (45-46 on the pilot relay, and 87-30 on the other relay) may not be identical. Relays are categorized in terms of the number of volts needed across the coil to make it switch, and the current capacity of the main circuit. Your motorcycle certainly has a 12VDC supply to the relay coil, so the only other thing to determine is how much current will the main circuit see. Most generic automotive relays are either rated for 15A or 30A. What does your relay need to turn on?
I am getting a considerable voltage drop between the battery and the coils during cranking. This is a mod to provide direct current to the coil to by pass the wiring fault/resistance.
The voltage drop may not be your problem and so the relay may not solve it. Read this article and you'll see that depending where you're taking the voltage measurement, the voltage drop may be normal. www.motor.com/article.asp?article_ID=407
"...an oil-filled ignition coil might require about 4 amperes of current at 12 volts to produce 20-30 kilovolts (kV), while a modern e-core or coil-on-plug configuration might require about 7 amperes of current at 12 volts to produce 30-60 kV of high-intensity spark. "
That means that a typical automotive style 12VDC relay with contacts rated for 15A should easily be enough for what you want to do.
will be back tracing wires shortly, want to make sure I have a good spark first. Then I can go from there to find where the voltage drop is. Bike sat last oct-nov outside in rain under cover, so I am pretty sure there is a corrosion issue somewhere.