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Single relay intercooler harness problem(Help)

MrOldschool45

MrOldschool45
Joined
Sep 6, 2017
Threads
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Location
South Chesterfield, Virginia
First Name
Don
Vehicle(s)
2017 Mustang GT Performance Package
Hello everyone

I'm hoping someone can shed some light on my issue. I'll try and keep it short:
I couldn't get my intercooler pump to turn on. After a ton of trouble shooting, it turns out that it's the harness. Wires are good, relay is good, all connections check out.
I mounted the relay, ground and Fuse holder wire where I was instructed and then it was verified to be correct(3 ground area on the front passenger side)
Soooo, I could never get it to work. Only after I took the harness off the car for testing with 12 vlt battery could I get it to work. It worked when I connected the Fuse Holder wire to power. Which I did because I read somewhere online that they were usually hot/positive. Can someone clue me in?

I thought this was a simple hookup. This harness has a Key On power source from the radio capacitor behind the engine, then it runs up front and the relay, ground, and fuse holder mount to the ground points in picture, and then the harness runs to the pump. I'm thinking that the Fuse Holder wire mounts somewhere else, but I don't know.

Thanks

20231029_100546.jpg


Screenshot_20231029-144546_Gallery.jpg
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