If you’ve got a pre-made Holley wiring harness and need to add a sensor, the process is actually fairly simple. Thanks to the Holley EFI Power Tap, there’s no need to cut up the harness to add a sensor. In this video, Holley’s Ray Frescas explains how you can use the Holley EFI Power Tap to expand any Holley pre-made harness.
The Power Tap is a dedicated four-wire connector that Holley has built into its harnesses. This creates an easy access point to the harness that eliminates the need to do any cutting or splicing.
When you look at the Power Tap, you’ll see a black chassis ground wire, a black/white stripe sensor ground reference wire, an orange 5-volt reference output for stable sensor supply power, and a red or green (depending on the harness) 12-volt output wire that’s only live when the engine is running.
There are a few things you need to keep in mind when using the Power Tap. The 12-volt circuit can only be used for low-current devices, not anything that requires a high amp draw. You’ll also need to limit the 5-volt reference to just high impedance sensors.
So, what can you use the Power Tap for? Common applications include flex fuel sensors, dome pressure sensors, alternator exciter leads, and other aftermarket EFI electronics. The big benefit that users will see is from cleaner installs that make troubleshooting easier if there is a problem.
Make sure you check out the entire video to get a better understanding of how to use Holley’s EFI Power Tap.
You might also like
Cleetus McFarland Selling His Record-Setting "Eagle" Camaro
Cleetus McFarland is selling the world's fastest radial tire car. You can now own Eagle and be a top-tier small tire racer with this ride.
