Electrical Key on power for Fan relay

[Nine Finger Wrenching]

My question basically is do you see any problem with getting "key on" power from O2 plug to trigger fan relay?

I mounted my fan relay/thermostat on passenger side near O2 plug.
I found pin that showed 12v power when key is turned forward, but not when key is turned backward.
Don't ask me what color that wire is, I can't tell.... old wires and partial color blindness can be a struggle. LOL

I did a jumper connection with one of those little blue mash on connectors like you get with trailer lights to get signal to the yellow wire to trigger the relay.

So do you think this is okay to do? I didn't think it would affect anything with O2 since it was just triggering relay. It seems to be working great, but I would like an experience opinion on this.

Thanks in advance! ~Josh

 

[Bullitt347]

How many amps does the fan pull?
How many amps does the O2 sensor require?
How many amps is that circuit fused for?

 

[Nine Finger Wrenching]

How many amps does the fan pull?
How many amps does the O2 sensor require?
How many amps is that circuit fused for?

Fan is pulling power straight from battery. I'm just triggering a relay. Don't think that's a significant draw, but also why I'm asking.

 

[Bullitt347]

In that case I doubt it will hurt anything...not the way I would do it, but that is me.

 

[Mustang5L5]

I wouldn't touch the O2 sensor harness for this.

Low coolant sensor plug at the front driver's side of the engine bay is key-on power. I've typically used this as a fan relay trigger in the past.

 

[Nine Finger Wrenching]

I wouldn't touch the O2 sensor harness for this.

Low coolant sensor plug at the front driver's side of the engine bay is key-on power. I've typically used this as a fan relay trigger in the past.

Thanks! I'm gonna track that plug down. I may end up moving it.

Here's what I did.


View: https://youtu.be/9VOlPJ0BozM?si=M4aKa0XACKCKki6S

 

[AeroCoupe]

Just a suggestion but you either need a shroud for your air filter or move it into the inner fender area. You can get fan wash with them exposed like that and cause metering issues for the MAF.

Really clean install and the car is looking great man!!

 

[Nine Finger Wrenching]

Just a suggestion but you either need a shroud for your air filter or move it into the inner fender area. You can get fan wash with them exposed like that and cause metering issues for the MAF.

Really clean install and the car is looking great man!!

Thanks for that!! I had been looking at some of the cold air fender well kits. I totally wanna go that route. What's on here now is what came with it. Heck I've just been trying to get it to run. LOL This car was way more incomplete than what I had realized. Everywhere I turn I'm needing to buy something else to make it complete, or upgrade it. I am learning so much about this car that I wouldn'y have any other way. Gotta find those blessings!!

I REALLY appreciate you saying it's a clean looking install. That actually means a lot to me. I'm hoping to pull up to Cars and Coffee one day with the outside looking like junk, and the interior and engine bay looking awesome and clean.