Prodigy P3 Reading No Trailer Connected With 2002 Chevy Silverado  

Question:

Expert Reply:

Oftentimes when the reading says your trailer is not connected when using the Prodigy P3 # 90195, the cause is a connector that has corrosion or dirt built up, and ensuring they are clean inside and out can be a remedy. There are tests you can do as well.

You will need to find out if the issue is on the brake controller, truck, or trailer. To test the brake controller, sever the blue wire a couple inches from the back of your controller. Then use a circuit tester such as # PTW2992 to test the end of the blue wire coming out of the controller. It should only have power when you apply the manual override; if it shows power at idle then there is an issue with the controller, and it will need to be replaced.

You will also want to test the brake output pin on the 7-way socket; it should only show power with the manual override. If it shows power any other time, then there is a short somewhere between the connector and the brake controller you will need to find.

If the truck side checks out, then it could be the wiring to the brake magnets or possibly the magnets themselves. Inspect the power wires to the magnets and look for wires that may be pinched or otherwise damaged and fix as necessary. You'll also need to make sure the ground wires are attached to bare metal surfaces, free of any paint, dirt or corrosion.

You'll want to visually inspect the magnets; if you can see the copper windings coming through the magnets will need to be replaced. To test the magnets, you can follow the help article I have linked. I have also attached some help articles on testing and troubleshooting brake controllers for you to check out.

expert reply by: Kyle S

0