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Latching relay one input on/off

b1mmuo27

Member
I have a 2014 Ram Longhorn that didn't come with bed lights. I have 12v dc inside the bed from my 7 wire trailer plug. The lights are factory LED. I have a weather proof switch that pulses on/off. I tried using 72472M auto relays. I have a 12V input to turn the lights on & latch on. I push the same switch & the latch releases. I'm looking to see if there is a better way then using 5 relays. Thanks
 

JimB

Super Moderator
Most Helpful Member
I am sorry but I fail to understand the problem.

You have a 12v supply, a switch, an LED light unit, that sounds fair enough,
but why do you think you need five relays to turn the power on/off.

A bit more information would be helpful.

JimB
 

b1mmuo27

Member
The truck is canbus. I will explain it better. My trailer plug is in the bed. I have a live 12V. The only water proof switch I could find that looks decent was from a 2017 for pickup my buddy has in his. It literally is just a momentary contact. So I need a single input to turn the lights on & off. One push latch on, another push latch off. I am not using a toggle switch. The switch is for a canbus. That's why I am using relays. I am trying to find another way more compact to do the same thing.
 

crutschow

Well-Known Member
Most Helpful Member
Look for an impulse latching relay (a standard latching relay won't work alternately for a pulse input).
 

b1mmuo27

Member
The standard 86, 87,87a,30 & 85 relay does work with a pulse on then pulse off. Actually 5 wired together. Problem is they are big when ganged together & when using crimps on them they are a little fragile when in the tail light cut out. I was looking for something smaller.
 

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