Hi, I'm new to the forum. I am having a problem with my trailer lights. I have a 2006 Honda Accord. I purchased a Curt custom wiring harness #55502 for a 2003 to 2012 Accord Sedan. Simple to install, straight forward. My problem is the brake lights. All the other lights are working, Turn signals, running lights, 4-ways. when I hit the brakes the lights will sometime come on for about 3 hits, everything is fine, then I hit brakes again and no lights. the running lights are still on,but the turn signals will go off when I hit brakes, then come back on when I lift off brakes. I'm definite that it's not a ground problem. Also, all the lights on the car work fine during all of this. I don't know if it has anything to do with the brake lights being LED. I was wondering if anyone else experienced this problem and if there is a fix. Thanks in advance.

 

I have some voltage readings. I switched the trailer 1157 bulbs with 1157 LED bulbs. Everything works but the brake lights are very dim. As long as they were working I check voltage at plug, and right at the factory connection and I am getting 8.2 volts when brake is applied. Once again the car lights are all normal.

 

Are you having the same problem with the regular 1157 bulb and the 1157 led?

When you are testing for voltage, how are you testing? Is the bulb electrical connector unplugged, or are you back-probing a connector? What are you attaching the black volt meter lead for your ground?

 

With the 1157, no light at all, with the 1157LED, brake lights very dim but they are on. as for testing I've tested both sides of all connectors, in the wire itself. grounded to body and right to neg side of battery. no difference in readings

 

Just to be thorough, does you volt meter read ~12.6V when you measure the battery voltage between the battery terminals?

It sounds like the power wire has an issue along the way. The next step is work backwards to figure out where you are losing voltage. Move back to the connection between the car's harness and the trailer. You will have to determine the pin on the connector that is feeding the brake lights. Do the same voltage test where you use a good ground, like the - battery terminal or a bare metal bolt that is attached to the body for your volt meter ground.

If you have 12V there, then you have an issue in the harness going to the trailer. If not, then let us know the wire color and we can tell you the next place to test.

 

yes I'm getting 12 at the battery, I will make those voltage checks and get back to you.