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I've soldered in my relay 4 different ways and it still won't work. Help please.

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  • I've soldered in my relay 4 different ways and it still won't work. Help please.

    OK. I don't have the usual 30 amp automobile relay so I have no pin numbers. I have a Radioshack SPST .5amp relay that I want to wire inside of my inverter that would switch only the on/off switch of the inverter whenever I turn the ignition. I've tried several different configurations but I don't know which pins to connect to what.

    Below is a diagram of the last way that I had connected this relay (didn't work). The labels on the pinout of the relay comes from the bottom of the package so they should be correct. I just need somone to tell me if this is wired up correctly and exactly what pins should go to what wires. Maybe my ground is wrong since it is going to the 3rd prong (ground) of the ac plug.

  • #2
    ummmm....even if you had it wired properly I doubt very seriously that a .5 Amp relay will work for you. You are gonna need a bigger one....you mentioned this one was from Radio Shack....well you can get a 30Amp Auto relay there for like $5.....

    Also I am hoping that you have a fuse between the car battery and the relay.

    Your setup is pretty much exactly like mine...and I have issues even with my 30Amp relay....I have burnt out 3 in the last couple of months

    also do you have a diode in place?


    Actaully now that I look at you setup I am confused as to why you want a relay attached to the inverter switch.....I believe what you want is to have the inverter turn on with the ignition?

    If so you want to leave the inverter switch alone and wire the relay to the pole that powers the inverter. and the switched power would come from a AMP or your HU or something.....I will post a pic if you need a illustration.

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    • #3
      No way man, 30amp they rape you for. They're about $20 at radioshack. I do agree though, .5amp isn't enough.

      I would not wire it up this way if I were you. Otherwise you need to put some kind of a switch in along with your relay, in case something goes wrong, and you need to kill power quick. I'd also suggest you put a relay on your actual power in on your inverter.

      Edit: Sorry looked at it wrong. I thought you were replacing the switch on the inverter with your relay.
      Tidder

      Try RevFE
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      • #4
        Ummmm....maybe they cost that much in Atlantis or something....but in the US you can get them from Radio Shack for $6.29....here is linkage

        Here

        If you are paying more than that you need to have some words with you Radio Shack Manager....or his manager if need be....heh

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        • #5
          Check out digikey. You can get high current automotive relays for a few bucks.

          http://www.digikey.com/scripts/DkSea...S&Cat=32309784

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          • #6
            I think your coil ground may be the cause. If it's hooked to the AC "Ground" then it's probably not grounding. My ground on my inverter does not go anywhere. I ended up having to ground it myself.
            Tidder

            Try RevFE
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            • #7
              The 30 amp relays are $5 or $6. Do not make me get a receipt.
              Audio Rockford Fosgate: 900 Watt 4-channel amp, 501bd Mono amp
              Computer AMD 2400+ XP, 1 GB DDR RAM, Orbit Micro 250W DC-DC PSU

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              sure some girls fake orgasms.....but it's guys like me who fake the whole relationship

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              • #8
                Hey man, where you are, that may be, but here in the middle of nowhere, they charge a little more. And all they have are SPDT relays. Don't give me none of your big city crap.
                Tidder

                Try RevFE
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                • #9
                  Heh...well That argument doesn't work on me...they are $6 dollars here as well and I live in the middle of nowhere man. Minot, North Dakota....and no..that isn't part of Canada....<<======= I am always amazed at how many people as me about that

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                  • #10
                    I guess I will go to the shack and buy the 30amp switch although I know my current plan should work. I am basically using 2 turn on switches inline for turning on the inverter. One, the original flip switch, the other the relay switch. I should not need a 30 amp switch because I am only wiring inline to the power of the turn on switch, not the main power +12v from the battery. This also allows me to hide the relay inside the inverter caseing.

                    Theoretically, my inverter should not turn on unless BOTH switches are in the on position. First, the relay should only allow the on/off switch to receive power when the ignition is on. Then, my on/off switch also has to be in the on position to turn on the Inverter.

                    I believe someone on this board has also used a 1 amp or .5 amp relay to do this same thing. Either that or it's just alot of wishful thinking on my part.

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                    • #11
                      I'm tellin' ya man, check your coil ground. I really don't think it will work that way. C'mon, PROVE ME WRONG.

                      Edit:
                      Haha, just noticed this:
                      Originally posted by wonderworm
                      Maybe my ground is wrong since it is going to the 3rd prong (ground) of the ac plug.
                      Try hooking it to a normal ground.
                      Tidder

                      Try RevFE
                      The best resurrected frontend I've ever used, period.


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                      • #12
                        Originally posted by wonderworm
                        First, the relay should only allow the on/off switch to receive power when the ignition is on. Then, my on/off switch also has to be in the on position to turn on the Inverter.
                        Ok...I must be thick....if you just left the on/off switch on the inverter alone wouldn't it already function this way? I mean on is on...why do you need to add a relay to make it do as it already does....

                        sorry if I am being thick about this....but it just seems pointless to me. Just use the switch that is there.....I mean you could just leave it in the on position and then the inverter would always turn on when the other relay provides power?

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                        • #13
                          Originally posted by Tidder
                          I'm tellin' ya man, check your coil ground. I really don't think it will work that way. C'mon, PROVE ME WRONG.
                          Actually it would be proving you right. I'm soldering a longer ground wire right now to ground to the chassis. This relay will be done, and if some people can't comprehend what i'm trying to do, then they need to quit talking so much and listen more.

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                          • #14
                            Heh....sounds good to me....Burnout 3 is calling my name anyways....good luck

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                            • #15
                              UPDATE:
                              Changing my relay's ground to the chassis allowed the Inverter to boot up when turning on the Ignition. Sooooo...........success!...............almost.

                              However, when I plugged the pc in, the red overload light comes on and the PC turns off after attempting to boot.

                              So I'm thinking my problem now could be as follows:
                              When I originally hooked up the relay's ground coil to the AC third prong (ground) plug, I heard several beeps, and then my inverter shutoff completely. Fuses were still intact but maybe I smoked something in the inverter or otherwise messed it up.
                              I could test this by re-checking all of my contact points for a solid connection or completely removing the relay and seeing if the 400 watt inverter can boot the computer under default specs (I'd like to try this last).

                              If anyone has input before I do this, feel free.

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