How to Disable Hyperflashing (without Resistor)


Hyperflashing can be caused by aftermarket LED turn signals. As LEDs draw less current than regular bulbs the car’s control module “thinks” there is a bulb outage. Luckily our S550 Stang’s turn signals keep blinking as they do with OEM bulbs. Theres just that annoying signal from/in the instrument panel cluster (IPC).

A common solution is installing so called load resistors into the car’s light wiring.

Disabling hyperflashing by software

Some years ago the blinking noise came from the turn signal relays. Today’s instrument panel clusters simulate relay noise through a speaker. So if the turn signal LEDs blink as they should do and only our IPC does hyperflashing there must be a way to tell our car not to hyperflash, right? Right!

How it works

Leave the wiring as it is and just tell your Body Control Module not to check for turn signal bulbs outage – that’s it! 🙂

Proof of concept

So how do you disable?

For you guys that do have forscan, at BCM 726-27-01 change “1” at second position (from the left) to “0”. That’s it! 🙂