Heat Exchanger Pump Wiring

[KingChuck24]

Did some more test driving today and it seems like its pulling timing due to some heat soak. Realized that the heat exchanger pump was not connected so I tried to connect it. I found the harness that the previous owner put together for the heat exchanger (its an aftermarket supercharger). I needed some help identifying where the wires went:

So this is the relay:

Coming out of 3 is a red wire with a eyelet connector at the end. I think this goes to a constant 12 volt straight from the battery

Coming out of 5 is a wire that proceeds to the connector that powers the heat exchanger pump, it then goes back out of that and to another eyelet connector. I assume this would be a ground to complete the circuit from 3 to 5.

Coming out of 1 is a wired fuse that connects to the ECU fuse. I know for a fact the previous owner had it on there. The second spot for a fuse is the normal ECU fuse.

Coming out of 2 is another eyelet connector that is black, I am assuming this is a ground to complete the circuit from 1 and 2.


I don't want to start another fire so I was wondering if anyone would weigh in and let me know if they think this is right or wrong. There also might be a better way to wire this in so any suggestions would be appreciated.

Thanks!

 

[Chris_WNC]

If I'm looking at it correctly...

1 and 2 are the coil. One will be 12v+ the other will be 12v-. When both are present it will energize, completing the circuit between 3 and 5.
3 and 5 will be your switched circuit. Normally it is a 12v+ supply for the electronics.

CHRIS

 

[KingChuck24]

When you say 12v- is that the same as ground?

 

[Chris_WNC]

Yes. Ground.