I am having problems with some wiring. I have a momentary on switch that I would like to be able to turn off a normally open relay. Specificly I have canabalized a cargo light/fog light switch and I want to turn on/off my back up alarm with the fog light switch. I’ve got everything figured out but how to turn on/off my N.O. relay. I assume there is something that will turn send juice when it receives a charge and will stay hot until it receives that same charge? Make sense???

Anyone dissect a cig lighter to turn it into a switch? So you can just push it in and have it pass voltage and it stay in and not heat the element. Or pull it out to stop the flow. I’m going to try to dissect one sometime to see if I can figure it out…..

TIA

What exactly are u wanting to do?


I assume u want to be able to control the B/U alarm, like at nite or early morning.


Why not hook it up to back up lite wire (put a on/off switch in the wire) to close relay.


This way u can control it and only on in reverse.


BTW the cig lighter use heat from the element to release the lighter when hot.Edited by: Dmax Tim

What is a N O relay? Or are you talking about a relay with a normally open contact? If you are trying to turn a relay on/off with a push button switch you need a latching relay, which might be tough to find in a 12v. You can only use you're cig lighter socket for a source of power, but this would mean having a plug plugged in all the time. Careful you don't get burn't!http://www.dieselplace.com/forum/smileys/Ermm.gif

I think you can do what you want to do. I just need a better explanation. You can also use a cig lighter to do what you want to do as long as the load isn't too great. I personally wouldn't but it can be done. Try a better explanation and I will try to help.


Edited by: Max Power

Is your fog light switch momentary?



You can't really use one momentary switch to turn the same relay on and off. You need several relays to do it.Edited by: Max Power

I have my back up alarm on a NC relay running off of my reverse lights right now, this relay also powers my aux back up lights in the light bar. The main reason I want to be able to turn it on/off is because at night the reverse lights come on when you hit the keyfob unlock and thus my truck strts beeping for no reason, kinda anoying and embarassing. I have it switched off most times(I put it under my tool box and have all my wiring/relays in my tool box and the switch in the box) I would like to be able to turn the thing on/off from inside my truck. I also like the factory look, I hate having nonfactory buttons and switches. I have a great candidate in the foglight switch since I dont have fog lights and I already bought it and it looks factory. Only problem is that it is a momentary on button not a constant on like I though. I want to put a NO relay in the BU alarm circiut because it will normaly be open since I normaly want it on.


So I need a way to send a constant charge to trigger a relay off of a momentary charge and then have the constant charge stop when another momentary charge is applied.


What ever it is would hopefully be 12 volts(although I suppsoe I could limit it if need be) but will only have the amp draw of switching the relay its controlling. I dont care if I gota use some wierd sytem of relays and circius midgets, as long as it dont turn into an 80$ switching episode.


This would be an easy project if the foglight switch wasnt momentary but I dont know what will do what I want it to do. I have disected the switch and another possibility is to take out its springyness and basicly turn it into a push pull switch but thats kinda jankyhttp://www.dieselplace.com/forum/smileys/Geek.gif


Sorry to confuse things. The cig lighter is a totaly seperate project that will controll a relay. I dont like to run juice through switches and other things....


Make more sense now?http://www.dieselplace.com/forum/smileys/Confused.gif


The "pros" at radioshack were less thanhttp://www.dieselplace.com/forum/smileys/Ermm.gifSeems like all they sell there and know about is cell phones and cheap RC cars

Here is a diagram using diodes and 4 relays.


http://www.dieselplace.com/forum/uploads/F99_latchonoffsp.gif


Here is a diagram using 6 relays and no diodes. The blue thing at the bottom represents the switch.


http://www.dieselplace.com/forum/uploads/D8D_latchonoffspnd.gif

Thanks! I thinkhttp://www.dieselplace.com/forum/smileys/Confused.gif......might take some more digestinghttp://www.dieselplace.com/forum/smileys/Embarrased.gif, I dont really understand how its working but I should have it once i look at the relay and remember what # is what. I always have to look at the map to remeber what the hell does whathttp://www.dieselplace.com/forum/smileys/Embarrased.gif I like to know how stuff works not just that it does. I like doing wiring and stuff since its like a big puzzle to figure out how to get it to do what you want. Still not quite sharp on it but the more I learn the more i can figure out on my own.


Are those all N.O. ??? And the 12v output should be triggering my relay that is between my BU alarm and the relay for the reverse lights right?


Thanks againhttp://www.dieselplace.com/forum/smileys/Approve.gif

I'm cruising the12volt.com


It may answer my questions......seems like a very inforrmative site. Thankshttp://www.dieselplace.com/forum/smileys/Big Smile.gif

terminal 30 is common,terminal 87 is n o -normally open, terminal 87a is normally closed, and normal means when the relay is at rest, or not operated. terminals 85 and 86 are the coil. Nice pictures Maxpower! If you could find a latching relay, however , you could do it with just 1. Or why not just put a relay in the lead from the backup lights to the backup alarm that is only operated when the ignition is on so the circuit is broken when the truck is not running therefore the BU alarm won't sound with you're unlocking the truck. Then you can forget the switch. It would wire like this: term 85 - to a switched ign lead, term 86 to ground, term 30 to backup lights, term 87 to backup alm +, backup alm - to ground. You could have this ahead of your aux lights on your light bar as well if you didn't want them on with the remote. Just my 2 cents but the less complicated you get the less trouble you'll have.


http://www.dieselplace.com/forum/smileys/Approve.gif

I agree with army. I would do it the way he suggests. Much, much simpler.

army, what your doing does make sense and thanks for the explination. Going off a ign hot wire would definatly kill the beeping with the truck off and be simple. Like they say KISShttp://www.dieselplace.com/forum/smileys/Big Smile.gif


I think i may go that wroute, but i would like to be able to utilize the momentary fog light for something else then.


So a "latching" relay would do what I'm asking in one shot without multipule relays? And i need to hunt one of those up?


I like the factory lookhttp://www.dieselplace.com/forum/smileys/Geek.gif I'm also in the process of stuffing another factory blinky light switch in so I can turn on my stobes seperate from my lightbar. Right now its all one shot.

I think I may have found something here www.nteinc.com/relay_web/latching.html

R72-11D1-12C I’m thinking this one might do the trick??? Its under the R72. The r50 has some weird description about different voltage needed to switch it, what ever that means???Edited by: ratlover

looks like that would work, depending on how it's set up. Some latching relays flip back and forth with power applied momentarily using no power afterward, which is what you want, others are held latched by the main power source after momentarily applying power to the coil, which means it will reset if you remove power all together. Follow me? I'd go the simple route and use the fog light switch for something else- louder auxilliary horn like Hoots maybe? Good Luck http://www.dieselplace.com/forum/smileys/Approve.gif

Thanks for all your guys helphttp://www.dieselplace.com/forum/smileys/Big Smile.gif


Hmmm......big horns.....That would make my truck even more loud and obnoxious huh? I likehttp://www.dieselplace.com/forum/smileys/Cool.gif