Troubleshooting Brake Controller Function on Discontinued Draw-Tite iCommand With No Display Showing

Updated 03/19/2018 | Published 03/16/2018

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Hook Probe Circuit Tester

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10 Gauge Wire - Blue Primary - Per Foot

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30 amp. In-Line Circuit Breaker - Perpendicular Mount Bracket

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$7.24

Question:

I have the Draw-Tite I-Command Trailer Brake Controller - 1 to 4 Axles - Proportional, and when i wired it it only turns on when the brake is pressed, and the other day i went to take it out with the trailer to set it up and now i have nothing working on it. Is it supposed to turn on with the vehicle? and what should i look for since it doesnt turn on now even with the trailer plugged in?

asked by: Zeke R

Helpful Expert Reply:

The Discontinued Draw-Tite I-Command Trailer Brake Controller 5535 should show a single dot when the trailer is not connected with the boost off. When connected, you should have a dot c to show the trailer connected and the boost off. There should be a digital numerical display when the brake pedal or the manual override is activated to show your output. I've attached the manual to assist.

No display shows a lost of power to the brake controller. You will want to check the black power wire using a circuit tester like # PTW2993. If there is power there, then you most likely have a bad ground (white wire). If you do not have 12V power on the black wire, then the first thing to check is your owners manual for any fuses that may need to be checked for replacement. If fuses are good, then you will need to manually trace the wire with your circuit tester to find the short and replace as needed with # 10-1-1.

You can run power from the battery to your controller using # 10-1-1 and circuit breaker # 38630

expert reply by: Jason S