Wiring questions

What you guys don't realize, and what I pointed out earlier, is that there is more than one type of 5 pin relay...

Normally open relay...


Changeover relay ...


There are also additional types of 5 pin relays available (Time delay, diode, etc). So when you are replacing one, make SURE the diagram on the side of the relay, matches the one you are replacing EXACTLY!!
Well, hey dick, why didn’t you specify? :ROFLMAO:
 
What you guys don't realize, and what I pointed out earlier, is that there is more than one type of 5 pin relay...

Normally open relay...


Changeover relay ...


There are also additional types of 5 pin relays available (Time delay, diode, etc). So when you are replacing one, make SURE the diagram on the side of the relay, matches the one you are replacing EXACTLY!!

Your first example doesn't have 87A. There is no NC to common contact. It's 2 87(s). It's just multiple outputs when triggered.

This is not ideal for running multiple fans.
 

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Your first example doesn't have 87A. There is no NC to common contact. It's 2 87(s). It's just multiple outputs when triggered.

This is not ideal for running multiple fans.

30amp relay for two 6 amp fans??

I'm pretty sure he'll be fine.

Where the problem comes in is...

The wiring at the base connectors, that match his existing ones. Id want pins 30 and 87's to both be 10 gauge wires. This is easily fixable, if they don't come that way, with some female connectors and the correct gauge wires. 👍🏼

Could always go with a 40amp, or bigger relay, if needed.
 
30amp relay for two 6 amp fans??

I'm pretty sure he'll be fine.

Where the problem comes in is...

The wiring at the base connectors, that match his existing ones. Id want pins 30 and 87's to both be 10 gauge wires. This is easily fixable, if they don't come that way, with some female connectors and the correct gauge wires. 👍🏼

Could always go with a 40amp, or bigger relay, if needed.

It can handle the load, but if it fails, no fans for you. Best to split them.

10ga is overkill big time for 6a. 14 would be fine.
 
get the Hella relays with 1/4" terminals.

the same relays with the smaller terminals have a habit of melting the terminals, even when well below the rated load.
 
Okay so here is what we’re working is. Finally got a chance to check out the backside of the wiring.

Back / grey wires appear to be for the radiator fans (2)

Yellow wire to the fuel pump

Bigger red wire to the ECU

Smaller red wire appears to be the jumper wire going between the relays but also connects to the 15A reset-able breaker… is that pretty standard to have that going through a breaker?

Doesn’t look like it was wired up with any blanks. So to add my trans pump circuit and 2 intercooler fans… would most recommend to do it the same way these were done or to use something else?

Relays are song chuan brand

IMG_1303.jpeg
 
get the Hella relays with 1/4" terminals.

the same relays with the smaller terminals have a habit of melting the terminals, even when well below the rated load.
Any time I plug a relay in, I visually inspect the female side to make sure all the connections are close and tight. Any that aren’t close, I use a pick and bend them in.
 
Okay so here is what we’re working is. Finally got a chance to check out the backside of the wiring.

Back / grey wires appear to be for the radiator fans (2)

Yellow wire to the fuel pump

Bigger red wire to the ECU

Smaller red wire appears to be the jumper wire going between the relays but also connects to the 15A reset-able breaker… is that pretty standard to have that going through a breaker?

Doesn’t look like it was wired up with any blanks. So to add my trans pump circuit and 2 intercooler fans… would most recommend to do it the same way these were done or to use something else?

Relays are song chuan brand

View attachment 161695

So odds are...

You're probably going to be adding even more stuff down the road eventually?

Might as well go with one of those fancy relay boxes now, (similar to what @EastMT posted) that have the ability to add even more components.

Buy once, cry once! :P
 
Okay so here is what we’re working is. Finally got a chance to check out the backside of the wiring.

Back / grey wires appear to be for the radiator fans (2)

Yellow wire to the fuel pump

Bigger red wire to the ECU

Smaller red wire appears to be the jumper wire going between the relays but also connects to the 15A reset-able breaker… is that pretty standard to have that going through a breaker?

Doesn’t look like it was wired up with any blanks. So to add my trans pump circuit and 2 intercooler fans… would most recommend to do it the same way these were done or to use something else?

Relays are song chuan brand

View attachment 161695
the 15a is the power for the relay coil pretty normal to be fused and the ground side is switched to turn the relay on and off. this way if a wire rubs or shorts to ground it just activates the relay rather than burn the wire
 
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