On an 89 Ford Bronco with 5.0L, how many amps run through the 2 yellow power wires from the starter relay (engine bay, passenger fender wall) to the ignition switch (top of steering column)?


Asked by Mar 02, 2014 at 03:28 AM about the 1989 Ford Bronco XLT 4WD

Question type: Car Customization

Due to repeated problems with the ignition actuator breaking and the actuator rod bending, I'm
considering making a push start button ignition system with a couple toggles for accessory power
and EEC/engine control, a button to start the vehicle, 1 hidden switch for security purposes, and an
in-line fuse.

The wires are 12 gauge. How many amps are running through the 2 yellow power wires?

What amp rating hardware would be a safe bet to use? 10a, 20a, 30a, 40a?

2 Answers


12 gauge wire is for up to 20 amps.

1 of 1 people found this helpful.

The most Amperage I've ever seen on those wires has been 25, but that was a surge amperage, normal runs around 20 amps.

1 of 1 people found this helpful.
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