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Troubleshooting Lights Failing After Installation of Curt 59236 on 2010 Audi Q5  

Question:

I have installed two of the 59236 on my Audi 2010 Q5, and have experienced the same problem with both units. All tests well, all functions well - until you start the car. The left and right turn signals slowly start to function intermittently, then fail altogether, about a minue or two after starting. Same with the brake lights. I can say it is definitely not the ground as I doubled up to the vehicle just in case. There is plenty of power going to the unit, even when I start the car and the lights start to flicker and die. All connections are solid and tested. I am done with my troubleshooting, it beat me! Anybody?

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Expert Reply:

It sounds like you have checked everything following your # C59236. A single harness failure happens sometimes but two in a row is not something we really see. The only thing I can think of is checking the power source. Make sure you are in fact hooked up to the vehicle battery.

Outside of that, I can only recommend using the Tekonsha Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness # 119250KIT instead. Tekonsha is the most reliable when it comes to wiring so if it is actually the Curt wiring harness failing you can expect the Tekonsha to work.

I attached an installation video for the Tekonsha harness on a 2012 Q5 below for your reference. It is probably worth looking at to see if you missed anything during the installation since it is the same process for the Curt.

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Robin H

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