Hi There!

 

I recently changed most of my bulbs to LED bulbs,

 

I have a problem with the indicators however,

The bulbs themselves indicate fine and at the right speed, however on the dash the ticking is really fast and the green arrow also flashes twice as fast.

 

Is this because of the bulbs? Do they not communicate with the car or something?

 

Please help!

25 minutes ago, Tomcio2279 said:

Hi There!

 

I recently changed most of my bulbs to LED bulbs,

 

I have a problem with the indicators however,

The bulbs themselves indicate fine and at the right speed, however on the dash the ticking is really fast and the green arrow also flashes twice as fast.

 

Is this because of the bulbs? Do they not communicate with the car or something?

 

Please help!

 

Yes it's because of the LED bulbs, the control unit thinks you have blown bulbs because the resistance reading is wrong.

1 minute ago, sepulchrave said:

 

Yes it's because of the LED bulbs, the control unit thinks you have blown bulbs because the resistance reading is wrong.

Oh I see! Thank you,

 

And is there any way to bypass this or do i need to find special LEDs with right resistance?

23 minutes ago, Tomcio2279 said:

Oh I see! Thank you,

 

And is there any way to bypass this or do i need to find special LEDs with right resistance?

 

No way to bypass it, you've made a mistake, put the bulbs back in or live with it.

Iirc you can buy relays that disable this function so they will never flash fast 

You can fit resistors like this to each bulb wire https://www.ebay.co.uk/itm/2x-Car-50W-Load-Resistor-LED-Flash-Rate-Turn-Signals-Indicator-Light-Relay-Bulb/152609651142?ssPageName=STRK%3AMEBIDX%3AIT&_trksid  so that item would do just the rear lights and you'd need another set for the fronts

@Tomcio2279 - The base issue here is that the total resistance of the bulbs is what controls the flash rate of the indicator circuits. LEDs have a much lower resistance than the standard 21W incandescent bulbs, so the flash rate goes up. The same thing would happen if a bulb failed.

 

And legal stuff - a flash rate above 120 per minute is an MoT failure and/or a Motor Vehicle Lighting violation.

4 minutes ago, KenONeill said:

@Tomcio2279 - The base issue here is that the total resistance of the bulbs is what controls the flash rate of the indicator circuits. LEDs have a much lower resistance than the standard 21W incandescent bulbs, so the flash rate goes up. The same thing would happen if a bulb failed.

 

And legal stuff - a flash rate above 120 per minute is an MoT failure and/or a Motor Vehicle Lighting violation.

Ooh  so even that my bulbs work, the car will still fail mot because of the speed of dash arrows flashing?

13 hours ago, sakta said:

Iirc you can buy relays that disable this function so they will never flash fast 

Hey do you know where I can buy them from and ones that would fit my fabia mk1?

Just now, Tomcio2279 said:

Ooh  so even that my bulbs work, the car will still fail mot because of the speed of dash arrows flashing?

Sort of; the real issue is the rate the bulbs flash at rather than the idiot lights, but the idiot lights will work at pretty much the same speed as the bulbs.

58 minutes ago, KenONeill said:

the total resistance of the bulbs is what controls the flash rate of the indicator circuits

 

Not really.

 

Re-read the first post Ken. His indicators are flashing at the right speed, it's just the telltale and clicker that are over-speeding. The decrease in load current is what is leading to the fault detection and reporting via the faster telltale and piezo sounder click rate.

 

The direction indicators in Mk1 Fabia are solid-state controlled (BTS840S2 chip in J519 module) , so there is no direct link between bulb resistance and flash rate of the indicators themselves. 

 

Nige's solution will probably work, but is a hassle, and an extra expense. No doubt the LED bulbs were already many times the cost of incandescent bulbs. All rather pointless in my opinion.

 

 

 

 

 

Hopefully this video will help, as I said my actual bulbs flash normal speed like they always have, it's only on the dash board that the arrow flashes twice as fast.

 

See the video attached.