Hi Guy's does anyone know how to adjust or remove the rev counter warning buzzer on an FD? I repaired my clock and it all works fine but now I have the warning buzzer going off when I hit just over 5000rpm which is a bit annoying!! I had to adjust the dial to get it to read right after it was fixed so maybe this in turn has knocked the buzzer out but I don't recall seeing anything else to adjust on the rpm counter?
Please help!

Thank you
Lee

 

for the life of me I can't remember if it comes from under the dash or center speaker. Pop the center speaker cover off and unplug it see if it silences it. If not might be worth checking the fsm see if it mentions anything in there?

 

I replied to this issue in another thread you have. The speaker itself is in CPU #2 in the driver's kick panel (black box).

Have you verified that your tach is accurate against an external source? Like the PowerFC commander?

Regardless it's an issue with what that tach is outputting. If you look at the wiring diagram you can probably find the wire that goes from the tach to CPU #2. You could remove the buzzer but that's also the low coolant/low oil buzzer which is good to have.

Dale

 

Hi Guys'
I figured it is the buzzer in the F100 box that does everything.. so no option to really remove it as you rightly point out it is good to have for other warnings. I drove the car today and for sure you hit 4600rpm and the buzzer sounds until the rpm falls below it again! Nice on the motorway!
Tach is correct give or take a 100rpm it is certainly not 2000+rpm out!
So if I find the wire coming out of the rev count to the CPU which I seem to recall there are 2 looking a a diagram the other day? Is the CPU box on the Instrument panel the F100 box? If I get the correct wire Can I just cut it and it won't effect anything else? I have no AC or P?S and after market Microtech ECU so I don't imagine any outputs from the tach will cause a problem as long as just cutting the wire does not mess up something else in the F100 or cluster? What about fitting a variable resistor to the wire if it is a signal going to the buzzer that trigger the buzzer at a certain amount? Then I could have an adjustable warning buzzer?

Thanks for info

 

Wouldn't be surprised it's the cpu2 itself that's defective - might be easier just to replace than go through circuits. Have a F110 one here that has the seat belt warning chime going continuously!

 

you say that.. and you might be right but. First I have to find one and then no doubt it won't be cheap. Is it a pig of a job to swap? I never really looked as to where it is? if it cheap to get and easy to swap then maybe? But being that my tach wasn't working before and then I had to re-calibrate it to read correctly I wouldn't be surprised if that has just messed up whatever output goes to the CPU from the Tach?

 

It's in your driver's footwell in the rhs area. Couple of 10mm hex nuts hold the sheetmetal bracket it's attached to....and two or three connectors from memory - pita contortion required, but no doubt you'd be doing the same cutting wires anyway.

Don't know the wrecker situation over there, but wouldn't expect to pay much here for one! If you've fixed the tach, seems the cpu suffers from the same crap, there's just snap tabs holding the circuit board in the "box" and it comes apart in a few minutes if not totally hamfisted.

 

Thanks for info... I will check it out.