Common Relays (With Pics)

[NskLJ]

Thanks. Updated the table.

You think I'm missing anything else that would be helpful to someone who's new to relays or looking for a recommended product?

I use this Bosch high current relay for fuel injection conversions on early Fords. I basically use the factory ignition switch to turn it on and off. Then the relay powers up essentially a stand alone system for the fuel injected motor. This allows use of the early switch that cannot handle a fuel injection systems electrical demands. I have used it on 1st gen broncos, comets, etc. I don’t think there is much use on a Jeep but could be used for overland type rig.

https://www.summitracing.com/parts/...MI0OS35eu_gwMV-hGtBh0LSgKtEAQYCSABEgJ2ifD_BwE

 

[SSTJ]

Does the "20/40" amp rating on this SPDT mean that each one of the two 87 pins can handle up to 20 amps? So 40 "total", even though only 20 should be used?

https://www.amazon.com/gp/product/B004NIKXSY/?tag=wranglerorg-20

 

[SSTJ]

I use this Bosch high current relay for fuel injection conversions on early Fords. I basically use the factory ignition switch to turn it on and off. Then the relay powers up essentially a stand alone system for the fuel injected motor. This allows use of the early switch that cannot handle a fuel injection systems electrical demands. I have used it on 1st gen broncos, comets, etc. I don’t think there is much use on a Jeep but could be used for overland type rig.

[URL]https://www.summitracing.com/p...MI0OS35eu_gwMV-hGtBh0LSgKtEAQYCSABEgJ2ifD_BwE[/URL]

Adding it now.

 

[707kevin]

Does the "20/40" amp rating on this SPDT mean that each one of the two 87 pins can handle up to 20 amps? So 40 "total", even though only 20 should be used?

https://www.amazon.com/gp/product/B004NIKXSY/?tag=wranglerorg-20

The dual ratings are used when NC/NO ratings are different.

 

[Coachgeo]

The 97 is a good example for using relays to perform logical operations. You can set up relay arrangements to implement logic gates just like a programmable controller or transistors in an integrated circuit.

View attachment 487442

numerous things with the same name make this a hard to read. example . Last one at bottom. the very end it says. ".... de-energizing R1. " Well there is five different R1's in the diagram. One of the five being NC. Each item from top to bottom has an R1 Relay? and the bottom also has an R1coil .

There is three R2's...and two R3's, which does not help either.

Also does not the coil (an electromagnet right?) close the switch allow Pos. path thru relay??? so why is the coil AFTER the switch on the negative/ground side.... should it not be on the Positive side? and why does two or three relays have only one coil? Isn't each relay suppose to have its own coil . (assuming you read this as energy flows in a Pos. to Neg./Ground direction (clockwise in this diagram)

 

[B1Toad]

numerous things with the same name make this a hard to read. example . Last one at bottom. the very end it says. ".... de-energizing R1. " Well there is five different R1's in the diagram. One of the five being NC. Each item from top to bottom has an R1 Relay? and the bottom also has an R1coil .

There is three R2's...and two R3's, which does not help either.

Also does not the coil (an electromagnet right?) close the switch allow Pos. path thru relay??? so why is the coil AFTER the switch on the negative/ground side.... should it not be on the Positive side? and why does two or three relays have only one coil? Isn't each relay suppose to have its own coil . (assuming you read this as energy flows in a Pos. to Neg./Ground direction (clockwise in this diagram)

You're looking at it wrong, look at each example and it's explanation to the right of that. Each of the 4 is a separate example and a separate circuit, they do not interact with each other, the only thing they are sharing in common is the power.

 

[Coachgeo]

Im here only to try to decipher what looks to be common convention/pin out of the relay "sockets" used in TJ since they all appear to be the same relay type. What pin is always the one of two? potential hots coming in, (Some/most of relays; which hot is sent power is dictated by ignition key position, if I understand this right) and what pin(s) does it typically switch too when relay's coil is powered.... and which is typically the negative that continues the circuit path created by the switching.

Trying to trace where a few positives are available based on key position to tap into to operate devices. Don't need to go thru fuses and do not need to tap on a working relay itself but guess I could if I have too. Each device am sending 12v too, has its own relay to carry out its job once powered.

Have some unused relay sockets and want to use their hot female to tap a 12v+ from ... "based on key position" . (need a few Run/drive hots, and one Start/crank hot)

Yeah I can pin it all out one thing at a time with a mulitmeter I guess..... but I cant hold key in start position, hold probe in place at Power Center, and run the mulit meter all at same time. that and its hot a shiat outside even under the umbrella LOL.

 

[B1Toad]

Im here only to try to decipher what looks to be common convention/pin out of the relay "sockets" used in TJ since they all appear to be the same relay type. What pin is always the one of two? potential hots coming in, (Some/most of relays; which hot is sent power is dictated by ignition key position, if I understand this right) and what pin(s) does it typically switch too when relay's coil is powered.... and which is typically the negative that continues the circuit path created by the switching.

Trying to trace where a few positives are available based on key position to tap into to operate devices. Don't need to go thru fuses and do not need to tap on a working relay itself but guess I could if I have too. Each device am sending 12v too, has its own relay to carry out its job once powered.

Have some unused relay sockets and want to use their hot female to tap a 12v+ from ... "based on key position" . (need a few Run/drive hots, and one Start/crank hot)

Yeah I can pin it all out one thing at a time with a mulitmeter I guess..... but I cant hold key in start position, hold probe in place at Power Center, and run the mulit meter all at same time. that and its hot a shiat outside even under the umbrella LOL.

If you look up your FSM in the resources section you will find all your wiring diagrams, connector locations, connector pinouts, splice locations and component locations. Get the ones you need and print them. Makes it easy.

 

[Coachgeo]

You're looking at it wrong, look at each example and it's explanation to the right of that. Each of the 4 is a separate example and a separate circuit, they do not interact with each other, the only thing they are sharing in common is the power.

Assumed that but figured I'd cover all my bases since AssUme is not every goood thing... Still though the last one has two R1's.

 

[Coachgeo]

If you look up your FSM in the resources section you will find all your wiring diagrams, connector locations, connector pinouts, splice locations and component locations. Get the ones you need and print them. Makes it easy.

99% of all that is disconnected and may not even be operational. so need to get switched 12v+ from the known working and accessible source. the Power Center. Ignore the bottom right corner wire. its just resting there. That is one of the wires I am trying to find proper home for. It use to be in there plugged into a female but its tag faded and cant read it. It may have been in a fuse spot or a relay spot. wire's end appears to be the type used to tap into a fuse yet. I seem to remember it sitting in a female of an empty relay spot.

 

[B1Toad]

Assumed that but figured I'd cover all my bases since AssUme is not every goood thing... Still though the last one has two R1's.

I see that, it looks like the R-1 to the left either should have been left out or the explanation should say R-1 or R-2 will energize R-1 (to the right).

 

[B1Toad]

99% of all that is disconnected and may not even be operational. so need to get switched 12v+ from the known working and accessible source. the Power Center. Ignore the bottom right corner wire. its just resting there. That is one of the wires I am trying to find proper home for. It use to be in there plugged into a female but its tag faded and cant read it. It may have been in a fuse spot or a relay spot. wire's end appears to be the type used to tap into a fuse yet. I seem to remember it sitting in a female of an empty relay spot.

View attachment 555139

OK now I remember, this is the Jeep with the Mercedes diesel! You have your work cut out for sure. If I were there I'd help, I actually enjoy electrical challenges. Which engine is it?

 

[Coachgeo]

I see that, it looks like the R-1 to the left either should have been left out or the explanation should say R-1 or R-2 will energize R-1 (to the right).

phew. glad to see Im not as dumb as I look. That is how I saw it.

 

[Coachgeo]

OK now I remember, this is the Jeep with the Mercedes diesel! You have your work cut out for sure. If I were there I'd help, I actually enjoy electrical challenges. Which engine is it?

yep. all I need is three hots with key in run/drive and one other hot in Start/crank. If you have suggestions please do pop over to that thread.

https://wranglertjforum.com/threads/where-to-get-12v-power-2002-tj-bastard.80785/

 

[B1Toad]

The run/drive power shouldn't be hard to find with a tester, there's lots of stuff that stays on when the key is in run position, then use it to trigger relays for the power. For start/crank can't you tie into the starter relay trigger to energize another relay? Can your 3 hot when running circuits also be energized during cranking? The GPs can use hot in run power due to the GP module timeout correct?

 

[Coachgeo]

The run/drive power shouldn't be hard to find with a tester, there's lots of stuff that stays on when the key is in run position, then use it to trigger relays for the power. For start/crank can't you tie into the starter relay trigger to energize another relay? Can your 3 hot when running circuits also be energized during cranking? The GPs can use hot in run power due to the GP module timeout correct?

The GPs can use hot in run power due to the GP module timeout correct?

That is my understanding.

all the devices have a relay built into them, so I can go direct to them from best hot spot.

IMHO now we are on a specific topic and would be best discussed in that thread on my concoction so not to take this Resource off topic. Will try ro copy this post over to there.