How to test a cruise control sensor

theyve had quite a few problems with the switch on steering wheel but also check for any trouble / pending codes will cause problem with remote start and cruise

Note the diagram, at least check the fuse. Check trouble codes, related to cruise control. to check codes yourself, at least, you need an obd2 code reader that will read po codes as well as manufacturer specific codes. It is worth the investment, in my opinion. Make sure the brake lites work.

Was Cruise Control working before the New Horn was installed? The power supply to the Horn, (input to ground wire) is connected to the Cruise Control Module (CCM). This CCM is wired to the Relay Switch Box located in the Engine Bay. The Relay Box cover will have a Chart indicating what function each Relay coresponds to. Your local autoparts store (AutoZone) can test the Relay Switch, and you'll know (if any Relay) need to be replaced.

The CCM is also wired to the Steering Wheel, but first passes through the Clock Spring Coil, located just behind the Steering Wheel. The Clock Spring allowes for the Function Buttons on the Steering Wheel to have power while Steering Wheel spins.

The Clock Spring can malfunction or break, its rare, but this will cut power to the Function Buttons on Steering Wheel. If ALL the buttons on Steering Wheel dont work, then the Clock Spring is the Culprit. The Coil may need to be replaced.

The Cruise Control Module itself may have failed and also would cause a few or all Steering Wheel Functions to quit working.

But first check the Relay Switch Box and examine the Harness Cables connecting (Steering Wheel--to--CCM--to--Relay Switch Box--to--Battery Supply).

Also if Cruise Control was working before the new Horn was installed and now not working, then most likely the Problem is a bad wire connection somewhere and/or is a faulty Relay.

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Yes, The ECU can keep it from working. Could be a defect cruise module, button on the steering wheel, or wiring. And the speed sensor as Tom suggested. But you wouldn't have the speedometer if it were that.

Cruise control will always disable itself when any CEL light is present, so that's normal. The Stabilitrak light problem is a known common problem with these. Your steering wheel position sensor needs to be replaced. Mine does it every morning IF my steering wheel wasn't put into a straight position when I parked it. Straighten the tires, turn the ignition off and restart. Light will go out.

Have you checked the connection under the air bag on the steering wheel but you must remember to disconnect the battery leads then leave the car for 30 minutes for the air bag to discharge before doing that I would pull the radio out from the dashboard and check all the multi plugs on the back of it first there are normally a fuse for multifunctional steering wheel control just check make sure you tested the right fuse

first ck fuse for cruise control,if ok ck power to main switch use a omp, amp meter for test, should have battery voltage to and from switch when in on position. if ok your next ck is steering wheel switch. air bag must be removed unhook battery wait five minutes remove airbag hook battery up ck steering wheel switch if ok below steering wheel is cable reel ck yellow connectors on both side for power if all have power to and from go under hood and ck power to cruise unit if ok pcm may not be letting it come on because of engine or trans readings dtcs pending or set can shut off cruise control

There is a cable reel (clock spring) in the steering column. If it was not centered when you put in the rack than it probably broke.... Is the SRS light on too? This cable reel allows electrical connection to the air bag and the cruise control switch (mounted to the steering wheel), so you can turn the wheel. Its operating range is two and a half turns from center in both direction. When you disconnect the steering coupler from the rack the steering wheel moves, now the cable reel is not centered. If you put it back on in this position and turn the steering wheel fully to one side the cable reel breaks. That could be what happened, however the cable reel is very expensive so make sure that's it before replacing. I recommend performing an input test on the cruise control unit to confirm.

The clockspring behind the steering wheel is possibly defective or unplugged. It is the one and only component that all of your symptoms have in common.

If you're not getting an OBD (on board diagnostic) code, and it is constantly flashing, then the system needs to be calibrated at the dealer. This occurs when you replace or disconnect/reconnect a component of the traction control system, i.e., the sensors (shared with the ABS system), to the steering wheel position sensor, or the yaw sensors, etc. If you have it calibrated and it comes back on, you've got a poor connection at one of the components. The prime suspect here is the clock spring in the steering wheel, aka "sliding contact" in the steering column behind the steering wheel. This provides power to everything in the steering wheel, inccluding the steering wheel position sensor. When this goes bad, it is tantamount to disconnecting and/or reconnecting the steering wheel position sensor. Fords are famous for sliding contact failure. Usually, you'll also have other issues with steering wheel components, such as the horn, cruise control, radio volume, air bag ("high resistence" OBD code), etc.