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EricFromCT
EricFromCT, Ford Technician
Category: Ford
Satisfied Customers: 3408
Experience:  20 years dealership exp., ASE A1-A9 L1 L2, Ford Lincoln Mercury Senior Master, Diesel Certified
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F150: I have a Ford 2013 F150 and have installed a set of Air

This answer was rated:

I have a Ford 2013 F150 and have installed a set of Air horns. I am up to finishing the wiring, I have installed a relay for the compressor. I am having having a problem finding an ACC circuit in the engine compartment to connect to the relay.

Eric :

Hi. Your best bet would be to hook up to the output side of the pcm relay in the battery junction box under the hood. That way when the key is on, there will be power for your relay.

Customer:

Which is the pcm relay? what would be the wire color to attach to?

Eric :

Let me see if I can get a diagram real quick...

Eric :

What engine do you have?

Customer:

3.5L

Eric :

Click Here for relay location. Use the location for the 3.5 engine

Customer:

I need to connect to which pin on the relay?

Eric :

Hold one sec...

Eric :

There are only 4 pins on the relay. They are labelled 1,2,3,5. Connecting to pin 5 would be power when the key is on.

Customer:

Thakyou Eric

EricFromCT and 3 other Ford Specialists are ready to help you