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coil relay mod

  • Thread starter Thread starter luvnwunderwoman
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luvnwunderwoman

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I purchased an Optronics relay from Advanced Auto today. The package says to use 30 as terminal for lights and horns and 87 as terminal from power source. This is opposite from the tutorials. Which should I use ?
 
luvnwunderwoman said:
I purchased an Optronics relay from Advanced Auto today. The package says to use 30 as terminal for lights and horns and 87 as terminal from power source. This is opposite from the tutorials. Which should I use ?
Click to expand...


87(NO) and 87a(NC) are the usual outputs
NO-Normally open
NC-Normally closed.

But is those are the manufacturer's (i.e. Optronics) recommendation then do what they say.
 
They have turned #87 in a different orientation from 85, 86 and 30 and designated it the input, but it really doesn't matter if you use 87 or 30. It is a heavy duty 40 AMP normally opened single pole single throw switch that doesn't care which side is line or load and will work equally well either way. I have the A-715A on my bike. I suspect it is a misprint on the part of the Taiwan manufacturer and 30 should be the input and 87 should be the output according to standard practices. I wired mine per the printed information and it works fine.
 
Last edited:
I used 30 as the input and it is working fine. I sincerely thank you for your replies.
Nick
 
The only time it will make a difference is if there is also an 87a terminal and you are using the relay to direct power to either what is on 87 or on 87a. In that case, you will definitely want to have 30 as the power source.

Actually, if you wish to choose between two sources for a single load, you will want 87 and 87a as your two sources and 30 will be your load.

Bottom line: electrically, it does not matter, only how you are using it in the circuit.

.
 
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