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Multiple Amps Or Accesories On Remote Lead

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Since 87A post is not used in the 5 post SDPT relay could a 30a 4 post relay be used instead?

Shannon

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Since 87A post is not used in the 5 post SDPT relay could a 30a 4 post relay be used instead?

Shannon

Anyone want to answer this? LoL. I'm asking because I'm about to wire up my junk and I have the 4 post relay that don't have the 87a. I got that relay because I thought it I was not going to use it why have it? But if the 4 post that I have wont work please someone tell me.. Thanks again guys!

Shannon

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The 87a post is only energized when the 86 pin is not energized.

So I can wire a 4 post relay the same way and it will still work?

Shannon

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Some auto relays have a diode across the relay already. Would these types be good enough to use?

I have been thinking about that too. Adding a diode with relay would be asking for additional work. S.P.D.T have 5 terminal and S.P.S.T 4 terminal.

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After doing some research i did like to know if anyone understood or have any knowleges of experiences with electronic relay? Correct me or not. There's two kind of relay that are commonly used in 12- volt automotive. (SPDT) relay's which have 5 pins, and (SPST) relays which have 4 pins. I heard that SPDT relays are often used in alarm installations. I assume we going to use SPST for audio equipments. What are the pin hook too?

pin 30 - + 12 volt ( battery + )

pin 87 - Amp / remote turn-on terminal

Pin 86 - head units remote turn-on lead

Pin 85 - ground

and

Pin 87a - no connection (SPDT only)

Relay are just small electronic that help power equipment.

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i found one on parts express or somewhere too, but a comment left at the bottom of the page said the diode was faceing the wrong way for a car amp remote and had to be flipped. thats even more work than putting your own on!

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