No Green Light on Tekonsha Voyager Brake Controller on 2010 Honda Pilot when Connected to Trailer  

Question:

Expert Reply:

The green light on the Tekonsha Voyager Brake Controller, # 39510, indicates that the trailer is connected to your Honda Pilot, so it will not come on unless a trailer is connected. If the green light does not come on when the trailer is connected, then there are a few things that could be causing the green light to stay off.

The first thing I would check is the trailer brake fuse in the secondary under hood fuse box. There should be a 20-amp fuse in fuse location # 14. If there is no fuse in place, Honda typically includes the 20-amp fuse stored in the glove box.

If the fuse is present and in good condition, we will want to test the brake output pin on the 7-way trailer connector on your 2010 Honda Pilot. This is the pin in the 5 o'clock position. This will give us an idea if the issue is on your Pilot or on your trailer.

You will want to use a circuit tester like, # PTW2993. Find a good ground for the tester, you could even use the 7 o' clock pin in your trailer connector and touch the 5 o'clock pin with the circuit tester. This should illuminate the green light on the brake controller indicating that the problem is on the trailer. The circuit tester puts a load on the brake output circuit and tricks the brake controller into thinking a trailer is connected.

If the green light does not illuminate, move inside the cab and find the blue wire on the brake controller wiring harness, # 3070-P, that you installed. Find the blue wire and probe it with the circuit tester. This should illuminate the green light on the brake controller. If the green light illuminates, then there may be a problem on your Pilot between the brake controller port and the 7-way trailer connector. This would need to be inspected a certified Honda technician.

If the green light does not illuminate after testing the blue wire on the brake controller harness, then there are two possible problems. Either the brake controller is not receiving power, or the brake controller is bad and must be replaced. To determine if the brake controller is getting power, you can probe the black wire on the brake controller wiring harness. This should be sending a constant 12 volts to the brake controller. If there is no power on the wire, check the 20-amp fuse in position 14 in the secondary under hood fuse box to see if it is missing or blown. This fuse is labeled Trailer E-Brake and can be identified in your owner's manual or on the legend of the fuse box.

If the fuse is good, there may be a problem with the brake controller port on your Pilot.

If the brake controller is receiving power, but not sending voltage back on the brake output circuit, then the brake controller is the problem and should be replaced.

If the green light illuminates on the brake controller when you test the 5 o'clock pin on your 7-way trailer connector, then we know the problem is on the trailer. I recommend inspecting the brake wire from the trailer connector to the trailer brakes. First check the trailer connector for any corrosion or dirt build up and clean or repair as necessary. Next, inspect the wiring running from the trailer connector to the brakes for any pinched, frayed or damaged sections that could cause a short. Finally, inspect the brake magnets. I have attached a trailer wiring FAQ as well as a FAQ that explains how you can test your brake magnets for you to check out.

expert reply by: John H

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