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Old 21-06-2012   #1
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Fitting a rev counter

I'm gunna be fitting this tacho...

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Here's a pic of the back of it. I know the blue wire needs to be connected but don't know to which port? And what other wires need to be connected to the other three ports?

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Cheers guys
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Old 21-06-2012   #2
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Re: Fitting a rev counter

I thought you needed one wire to the coil and another to earth?
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Old 22-06-2012   #3
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Re: Fitting a rev counter

If it's an injection Panda it needs to be connected to the ECU. I've posted up the details of the ECU wiring layout a few years back so should come up with a search
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Old 22-06-2012   #4
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Re: Fitting a rev counter

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Old 22-06-2012   #5
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Re: Fitting a rev counter

Thanks for your replies guys.

Sorry, I should have mentioned that this is to go in my 1.2 16v converted Panda.

I did a quick search for other threads that would already have the answer but couldn't find anything...

I've got the blue tachometer signal wire from the ECU, I'm just trying to find out if anyone knows what the other three connections will be? I have a feeling one will be earth and one will be lights but no idea what goes where.

The tachometer is from a Seicento sporting.

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Old 22-06-2012   #6
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Re: Fitting a rev counter

The ecu signal is the difficult one really, if you've got that already then its just one earth, one live for the lighting, and an ignition switched live. Don't know which is which on there but if you find the bulb holder and see if you can track the connections back from that it should narrow it down, obviously that's light and ground, then you know the other 2 are ecu and live.
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Old 22-06-2012   #7
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Re: Fitting a rev counter

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Old 22-06-2012   #8
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Re: Fitting a rev counter

Quote Originally Posted by aca View Post
Always seems a bit of a bodge that one IMO.

Here's my one with the ECU pin diagram
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Old 06-07-2012   #9
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Re: Fitting a rev counter

ive picked up a seicento rev counter and what ive figured out its.. hmm easier just to take a picture....




right, the Red wire is a live, Black is a earth, Yellow is illumination/side lights and the Blue wire is the ECU pickup.

i am running some tests on this one of mine to see what triggers the the needle to move. my plan is to wire the red and black into a 12v source then just to dab the blue wire onto the live.. see if it will give it a pulse to make the needle move. failing that ill use a 555 timer or my arduino to see if i can mimic a ignition coil pulse.. will see..


Edit,

What i have found out.. to get this to run on a earth switching points type system (the old ignition coil type non ecu controlled Jobie) the way you wire the thing up is:

Blue to ignition live, Black to an earth, and the fun bit! Red goes to the - side of the ignition coil. this is what i have just found bench testing it. and by dabbing the red wire onto an earth really fast makes the needle move.

i could do with testing it out on my car but its a bit late, a job for tomorrow!
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Old 12-07-2012   #10
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Re: Fitting a rev counter

Spent the afternoon trying to get the tacho working with not much success.

Thank you Dragon Man for the heads up on wiring connections, knowing the right colour wire to the right connection was a great start and because I have an ECU Tacho trigger wire from the Punto ECU I thought it would be plain sailing from then on....

However, I am still not getting it to work, not even a flicker.
When I put a meter across the earth and blue wire I do get 1.10v at tickover, rising and lowering incrementally with the revs. Does anyone know if this is what you're supposed to get?

I have come to the conclusion that the problem might lie with the match between the existing Panda electrics and the Punto engine loom. I say this because I've noticed that with the Tacho connected, when you turn on the ignition but not actually start the engine, the fuel pump does not switch off like it usually does as the pressure builds up, it just keeps on going. I thought it might be the live connection to the Tacho causing this, so disconnected it but no change, it turns out to be the earth wire. Some how the earth wire to the tacho makes the fuel pump run continuously.

I have looked at both Panda and Punto wiring diagrams but have not noticed anything obvious.

There is of course the possiblity that my eBay purchased Seicento Rev counter does not work, I have no idea how robust they are and it probably hasen't had the easiest of times being posted and as I have trialled various options on fitting it.

Any ideas, help or advice greatly received as ever.

Thanks Guys.
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Old 12-07-2012   #11
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Re: Fitting a rev counter

That's how mine looks like, but the signal is fed from the coil, it's much much simple to figure out. I do have CC sporting rev counter aswell - that was my original plan but it's to modern/oval compared with the cluster/ dash, and i didn't want to drill holes in.
It's really worth the hassel to have one onboard, than you can 'see' the noise if you guys know what i mean.
good luck with the wiring, there was a post made by 'jangcy' with a nice write up of the injection engine, will have a look tonight.
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Old 12-07-2012   #12
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Re: Fitting a rev counter

thats a nice RPM meter, where did you get it from? matches the dash well.

hmm i am unsure why your RPM gauge is not working:/ try wiring it in the way i did it where you use the blue to +, the black to ground, and the red to the ECU wire.
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Old 13-07-2012   #13
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Re: Fitting a rev counter

Sorry to be a pain, I'm sure that the more experienced FFers are sick to death of Rev counter queries but I would really like to get mine sorted.

In order for me to establish if my blue signal wire feed is corrupt or if it's my gauge that's not working could someone that has a working ECU supplied Tachometer feed, please put a meter across it to establish what sort of voltage or signal a working one should give. I can then compare with what I have.

Hopefully I can work it out from there.

Many thanks.
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Old 13-07-2012   #14
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Re: Fitting a rev counter

Quote Originally Posted by Dragon Man View Post
thats a nice RPM meter, where did you get it from? matches the dash well.
.
it came from Polski Fiat 125p, it those fiat's they were fited where the clock in panda's, it does fit panda dash design and the stering wheel came from FSM Fiat 126p (NOS with custom leather).

Re. rev counter, i'm sure there was another way to wire it up by connecting signal wire directly to the coil thru some resistors or diodes.
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Old 23-03-2013   #15
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Re: Fitting a rev counter

BUMP!

Just wondering how @RetroPanda got on with fitting the rev counter.

Wanting to fit one to mine (though I'm a standard Panda Fizz), any news?
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