Dimmer /rev counter tacho comms problem fix... Costs 1p

cdaxford · Jun 22, 2021

Hi Guys

I have been searching high a low for a fix on the dimmer switch problem on the Fn2. I have heard of guys buying new clusters and tested the old dimmer which works perfectly.

So if you Dash has a communication error or it goes off every now and again and you have to tap it... Or if the tachometer backlight keeps going off.. I have the fix.

I stripped the cluster out as per videos i watched...

They striped the cluster back exposing the circuit board.

I tried testing voltage but this didn't work well.. Number were inconsistent.

I noticed that circuit board directly behind the dimmer was the issue... Plastic fatigue has caused the resistor and switch to put board away from contactors...

When i pushed the corner in while the cluster waa plugged the back light came on... Let go and off..

I drilled a hole in corner of the circuit board in a dead non track area and ran. Screw with washers through to hold the board down.

See pics.... Worked like a charm

I

Kromium · Mar 14, 2022

looking forward to trying this been struggling with this for months, was considering getting the circuit board removed and having the potentiometer pins re soldered but will attempt this first

Kromium · Mar 14, 2022

And the board was not removed correct?

ec9250 · Oct 24, 2022

Hi everyone

I did as cdaxford says in the post above and it didn't work. I also renewed the welds and it didn't work. So I wanted to do a bypass or put a new switch in because that's where the problem is, if I press it the lights flash sometimes.

I've looked for a new switch and haven't found it, or haven't looked properly. Do you know where I can buy it?

If not, how do I bypass the switch?

Buying a used dashboard is out of question, they cost a kidney.

Sorry for my English, I tried my best.

Thanks in advance.

iqezer · May 22, 2023

Hi everyone, Anyone already solve this problem? I Still searching info to solve this problem as well... thanks in advance.

Dimmer /rev counter tacho comms problem fix... Costs 1p

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