Tekonsha Primus IQ Brake Control Thinks Trailer Connected for Short Time without Trailer Connected
Question:
On start up, my primus iq, shows as if a trailer is connected for approx 30secs, when I dont have a trailer on, then resets to normal, need help a.s.a.p as I am going on big trip in two days, thanks
asked by: Derrick B
Helpful Expert Reply:
A short could cause your Primus brake controller # TK90160 to think that a trailer is connected. You can check the 7-Way trailer connector at the back of the vehicle and check for any corrosion on the inside, where the wires attach, and outside on the pins. Also check for any loose, damaged, or pinched wires while you are back there.
Another possibility is dirty contacts on the inside of the brake controller. What you can do for this is apply the manual override fully then let it snap back into place. Do this several times to clean the contacts.
It is also possible there is an internal short which would mean the brake controller will need to be replaced. But you can test it first. In the vehicle cab you will need to sever the blue wire several inches from the back of the controller. Then use a circuit tester such as # PTW2993 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 something wrong with the controller and it will need to be replaced.
If it tests fine, then reconnect the blue wire. Then move on to the vehicle side trailer connector. Many times, dirt or corrosion can cause a short in a trailer connector as described above.
You can test the brake output pin and 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 track down.
I have also included some help articles on testing and troubleshooting brake controllers for you.
Products Referenced in This Question
Product Page this Question was Asked From
Tekonsha Primus IQ Trailer Brake Controller - 1 to 3 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Automatic Leveling
- Under-Dash Box
- Dash Mount
- Up to 3 Axles
- LED Display
- Up to 90 Degrees
- Tekonsha
more information >
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