I tried installing this today and couldn't get it to work. Followed the instructions and several YouTube videos to the letter.
1) Disconnected battery.
2) Grounded black wire (ground) from Backoff to frame.
3) Cut the blue brake light wire.
4) Attached red wire from Backoff to blue wire leading to power.
5) Attached white wire with red stripe from Backoff to blue wire leading to bulb.
6) Reconnected battery.
This left me with a tail light only and no brake light.
Just for the heck of it, I repeated the process using the red brake light wire (supposed to be the tail light). This left me with a fully functioning tail and brake light but the Backoff unit did nothing. I'd send it back, but now the wires are all mangled. At least it was just $41 with shipping. Anyone have an idea of what went wrong?
BACKOFF module will emit 3 short brake light flashes and then one long flash and it repeats. The signal automatically repeats itself as long as the brake lights are on. This pattern is not random, but has been selected because of its
ability to retain following drivers attention.Please Note: This module will not work with LED brake lights.
So you are frustrated and would like to make it work NP. Very simple
, this is what you do, go back to the original connection, blue wire from the bulb to red white and blue power to the red wire. This time you are also going to connect a resistor to the red/white and the other end of the resistor goes to ground. https://www.amazon.com/uxcell-Alumin...eywords=40+ohm
This resistor is overkill but readily available, and no need to worry about it overheating, about a 5 watt parasitic load while braking. I see no reason why this shouldn't work, as it imitates a incandescent bulb .
The reason why, the back off is a series switching device that uses voltage drop across it to drive the internal electronics, if you look it has a 10 amp rating or 140 watt rating, the total load is 5 watts plus the Led brake light should be sufficient to drive the back off, However https://www.amazon.com/Rating-Alumin...0+ohm+resistor
you could buy 2. This would give 10 watts plus, guaranteed to work. Try one first and if needed 2. Many of these devices have a minimum of around 0.3 to 0.5 amps to drive them, the LED brake light is much less . The 40 ohm is 14.2 VDC / 40 = 0.335 amp , two is 0.67 amp or 10 watts