TCS Light Comes on /with RT Turn signal

Load resistors negate the whole point and purpose of LED lighting. Mainly because they create an equal draw to a regular light bulb but just without all the life expectancy.

But Wait! This guy thought that LEDs are supposed to last a million hours. Well, in a lab with like 0% distortion in the power and ground and at a controlled temp. In the absolute best conditions ya maybe someone can get an LED to last that long. In a car, however, with constantly varying voltage from the rpm changing alternator and all the spikes from all the collapsing fields from the relays opening and closing as a car runs, and the temperatures of the engine bay, the exhaust, and other nearby light bulbs all make sure LEDs are the most unreliable thing to have in a car.

The manufacturers that have LEDs are using filtered signals to drive the LEDs. You can not create this on your old car. These circuits are noteable as coming directly from a controller and not being wired through a switch. These circuits care about current flow to the point that you can not add another light to one of these circuits as the controller will see the extra flow and shut down the circuit.

If you want lighting that lasts you should check out Sylvania Silverstar bulbs. And set them in their sockets with some dielectric grease for moisture protection and also to help wick heat away from the contact points where the socket meets the bulb.

If you want to make your LED light bulbs work in your C5 you need remove the load resistors as they are a fire hazard AT BEST. And install a digital or electronic flasher relay. This relay looks at time for flashing the lights and not load. For C5 the flasher relay comes with a sub harness and will plug in behind the dash and just underneath the ignition lock cylinder.

About your TCS code 1295. This code is telling you the brake light switch is open. This can be caused by one of two things. First this might be just that, a failed brake light switch. That is a very easy thing to change. And they are cheap. Having a short to ground from a failing load resistor tied to a brake light bulb could certainly hurt the contacts in a brake light switch. So there is that.

Also The brake light circuit gets run through the hazard light switch. This is because the turn signals are tied to the brake light. The bulbs in the back of the car have low and high. Low is marker lights. And high is the stop/turn. And the turn signals and flashers will just interrupt the brake light signal to make the high side of the bulb flash when you are stepping on the brake. While these contacts can also be hurt by a short to ground at a bulb these hazard light switches for C5 have a failure rate to them. You must unbolt and lift the dash pad to get this switch out of your car. There is information on this to be found on Youtube if you need direction on this.

And finally for whatever it is worth the electronic flasher for C5, this guy right here: Amazon.com: Corvette Envy C5 Corvette Hyper Flash Fix/Signal Fix/LED Bypass Hyper Flash Harness : Automotive does not plug in directly to the hazard switch. It does have the same connector. But the hazard switch has a small sub harness that leads down to a connection with the same connector just under the ignition switch. This is where this relay plugs in at. You Do NOT have to remove the hazard switch or lift the dash pad to install this relay. You should only have to remove the lower knee bolster on the driver side. Good luck and let us know how it all goes.