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Relay Wiring #5223397 09/26/19 08:08 PM
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2015_PSD Offline OP
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I am confused by one thing on this wiring and want to be sure that I have it correct. One of the Jeep forums that I am on posted a nice write-up of how to wire the side-step lighting, I translated the wiring connection text into a picture using the schematics of the AOLE ASH-DD25 relay.

When the relay is energized, how do terminals #1 and #2 connect to one another to pass 12v to the lights? It is confusing, since it seems that terminal #1 and terminal #4 would be pass through once the relay is energized as would terminal #3 and terminal #2.

What am I missing here or will this work?

For the Relay
#1 + Red wire going to your lights
#2 + Red wire going to your battery/fuse
#3 + Blue trigger wire that will get power with the interior/door lights
#4 - Two black ground wires, one from the lights and the other going to the battery

[Linked Image from iili.io]


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Re: Relay Wiring [Re: 2015_PSD] #5223399 09/26/19 08:18 PM
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CT8 Offline
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I would guess Wires 3 and 4 is the voltage to turn on the wire 1 and 2 circuit. Solid state relay?


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Re: Relay Wiring [Re: CT8] #5223427 09/26/19 08:44 PM
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Originally Posted by CT8
I would guess Wires 3 and 4 is the voltage to turn on the wire 1 and 2 circuit. Solid state relay?
Yes; it is a solid state relay. The confusing part for me is there is a positive and negative terminal on each side of the relay. The left side (control side) makes perfect sense, it is the right (load side) that has me scratching my head. Since terminal #1 is denoted as negative, it did not make sense to me that it would make a connection with terminal #2 which is denoted as positive because that would seem to create a short circuit would it not?


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Re: Relay Wiring [Re: 2015_PSD] #5223430 09/26/19 08:46 PM
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CT8 Offline
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Would checking out the voltages at all points to see what is going on help to figure out the wiring. Electronic controls can be strang until it is understood how they work, not fun.


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Re: Relay Wiring [Re: 2015_PSD] #5223455 09/26/19 09:04 PM
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55hambone Offline
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What the drawing has labelled as "load" would be your lights. The arrow that you show for 12 volt positive to lights should be drawn pointing to the side of the load (lights) that is labelled 1. The statement "#1 + Red wire going to your lights" is correct, but your arrow points to the negative side of the load, not to #1. It is not a short circuit because the load is between the positive and negative terminals.

Re: Relay Wiring [Re: 2015_PSD] #5223456 09/26/19 09:06 PM
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Sunnyinhollister Offline
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The LED biases the transistor allowing it to "turn on" or allowing the current to flow. If the polarity was reversed, there would be no current flow.

Last edited by Sunnyinhollister; 09/26/19 09:06 PM.

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Re: Relay Wiring [Re: 2015_PSD] #5223461 09/26/19 09:12 PM
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I figured it out with the aid of a 12v DC power supply and my trusty volt/ohm meter. Terminals #3 and #4 (control side) do not pass any voltage to terminals #1 and #2 (load side). When the control side is energized, there is a circuit created between terminals #1 and #2. Question answered and now to wire it all up.


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Re: Relay Wiring [Re: 55hambone] #5223467 09/26/19 09:18 PM
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Originally Posted by 55hambone
The statement "#1 + Red wire going to your lights" is correct, but your arrow points to the negative side of the load, not to #1.
The #1 terminal is marked as negative both on the schematic I posted and the actual relay as shown below and I am pointing to terminal 1 in my annotated schematic for positive to the lights. Look again at the schematic and you will see the "1" to the left of the minus sign for terminal 1.

[Linked Image from images-na.ssl-images-amazon.com]


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Re: Relay Wiring [Re: 2015_PSD] #5223469 09/26/19 09:19 PM
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Dinoburner Offline
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Without more info this relay makes no sense. It`s been 10 years since I`ve read a schematic and this one needs a legend. Never mind see it now

Last edited by Dinoburner; 09/26/19 09:23 PM. Reason: new info

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Re: Relay Wiring [Re: Dinoburner] #5223470 09/26/19 09:21 PM
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Originally Posted by Dinoburner
Without more info this relay makes no sense. It`s been 10 years since I`ve read a schematic and this one needs a legend.
See my post above, I figured it out. Basically when power is applied to terminals #3 and #4, terminals #1 and #2 are a switch that is closed making a circuit so the power from the battery attached to terminal #2 can flow to the lights attached to terminal #1.


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Re: Relay Wiring [Re: 2015_PSD] #5223486 09/26/19 09:55 PM
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Rand Offline
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That isnt intuitive but I'm not an electrical engineer.

So you get trigger power to terminal 3 it is then grounded on 4

on the other side the incoming battery is 2 when 3 is powered it connects 2 to 1 which is connected to the lights positive (despite having a negative sign next to it)

I could wire it up easy enough knowing that.. did it come with an instruction page or anything?


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Re: Relay Wiring [Re: 2015_PSD] #5223608 09/27/19 01:56 AM
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#1 is the load which has a path to ground through the component being powered. Amperage flow matters with a Transistor.

There aren't many automotive uses where a Solid State relay is needed outside of strobing, A Electromagnetic relay would have been more than suitable for this application. And Polarity doesn't matter.


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Re: Relay Wiring [Re: clinebarger] #5223676 09/27/19 06:23 AM
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Originally Posted by clinebarger
There aren't many automotive uses where a Solid State relay is needed outside of strobing, A Electromagnetic relay would have been more than suitable for this application.
In this case, I am using it to power the LEDs in the side steps and the internal light power (trigger) fades and an electromagnetic relay would chatter and not function properly. Others on the Jeep forum tried them and switched to solid state.


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Re: Relay Wiring [Re: clinebarger] #5223838 09/27/19 10:05 AM
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WyrTwister Offline
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Originally Posted by clinebarger
#1 is the load which has a path to ground through the component being powered. Amperage flow matters with a Transistor.

There aren't many automotive uses where a Solid State relay is needed outside of strobing, A Electromagnetic relay would have been more than suitable for this application. And Polarity doesn't matter.


Kind of what I was thinking . A relay is a switch , except it is activated by an incoming electrical / voltage source . In stead of being activated by your finger .

I have almost no experience with solid state relays , but I would use one as I would an elector-mechanical relay .

You are correct , the solid state relay does not really have a great advantage over an elector-mechanical relay . But , as long as the OP gets it working OK , it does not hurt anything . Which cost more , I do not know ?


Wyr
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Re: Relay Wiring [Re: 2015_PSD] #5223841 09/27/19 10:10 AM
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[/quote]In this case, I am using it to power the LEDs in the side steps and the internal light power (trigger) fades and an electromagnetic relay would chatter and not function properly. Others on the Jeep forum tried them and switched to solid state.
[/quote]

Had not considered that possibility . How long does/do the side step LED's need to be on ? Lust long enough to enter the vehicle ? How much power do the LED's consume ?


Wyr
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