21 replies to this topic

[Dan16v]

Model: Rio
Year: 1993
Description of problem (please be as in depth as possible):

Hi all,
I am just in the process of wiring in my Acewell Speedo for my KA dash conversion and have come across a couple of stumbling blocks:

Looking at the wiring diagram for the existing clocks, several of the connections are also connected to the voltage stabiliser, in the case of the Acewell unit there is only one connection, e.g. G/R wire for indicator wired directly to the allocated wire on the Acewell, does the stabiliser get used?

For the tacho connection, the Acewell has only 1 input, now the mini loom has 2 for the tacho, w/bk from the negative side of the coil and lg/o which I think is switched live. Do you only connect the w/bk to the Acewell?

Also, what kind of cable have people used to extend the speed pick-up wire?

Sorry for all the questions!

Cheers

Dan



Any non-standard parts that might be involved with the problem?

Acewell digital speedo

[Ethel]

I believe LG/O is hazards (just a permanent fused 12v feed)
I very much doubt the Acewell runs at more than 5V (if that) so it wouldn't be effected even if it was supplied via the voltage stabiliser - it will have one of its own inside. Just hook up the sensor wires direct to the Acewell and power it with plain 12volts for simplicity. white/black for revs - green/red for left indicators etc.

[adamg1380]

Also, what kind of cable have people used to extend the speed pick-up wire?

What kind of connection does the acewell dash have?

[Dan16v]

Also, what kind of cable have people used to extend the speed pick-up wire?

What kind of connection does the acewell dash have?

its a 3 wire single cable potted into the pick-up at one end and on a 3 pin molex on the other end where it connects to the unit.

[Dan16v]

I believe LG/O is hazards (just a permanent fused 12v feed)
I very much doubt the Acewell runs at more than 5V (if that) so it wouldn't be effected even if it was supplied via the voltage stabiliser - it will have one of its own inside. Just hook up the sensor wires direct to the Acewell and power it with plain 12volts for simplicity. white/black for revs - green/red for left indicators etc.

cheers ethel, I will give it a go. I was just going to use the white wire to power it, which is the normal power supply into the standard gauges

[Dan16v]

I have wired it all in and the only thing I cant get to work is the oil pressure switch warning light. I have wired it up to one of the acewell warning lights, but nothing has happened, is there anything special about the wiring of the oil pressure switch is there?

Also, the rev counter seems to be counting double, so showing 4k when its doing 2k, does anyone know if you can alter this kind of thing, the instructions are a bit poor as its a chinese copy

[pikey7]

Acewell user manuals in english!

[Dan16v]

Acewell user manuals in english!

cheers, it has a bit on how to set the RPM scaler, but noting on any of the wiring.

Everything else works ok, the main beam warning etc, it just seems to be the oil pressure switch that doesnt come on when you trun the ignition on.

[Ethel]

Warning lights, like the high beam, will earth +ve voltage down the wires, the oil light works the other way round i.e. it earths at the pressure switch. Does the Acewell have a +ve connection for the oil light? If not you could rig something up with a transistor (or relay) or look yor a presure switch with 2 terminals.

What have you got the rev counter connected to? Since Acewells are principally for bikes it may be set for a 2 stroke engine, see if you can change it in the setup menu.

[Dan16v]

Warning lights, like the high beam, will earth +ve voltage down the wires, the oil light works the other way round i.e. it earths at the pressure switch. Does the Acewell have a +ve connection for the oil light? If not you could rig something up with a transistor (or relay) or look yor a presure switch with 2 terminals.

What have you got the rev counter connected to? Since Acewells are principally for bikes it may be set for a 2 stroke engine, see if you can change it in the setup menu.

no, it only has some generic warning lights and a light for drive/reverse

looking at the circuit diagram, could I just take the 12v to one side of a 12v bulb and the other to the wire that does off to the switch? I have done something similar for the charge warning light and looks ok.

[pikey7]

iirc, you need to be careful with the charge light. it relies on the resistance of a bulb to sense the voltage, so if it's connected to an LED, the charge circuit won't work correctly. you'll need to add a resistor in parallel to correct it.

[Dan16v]

iirc, you need to be careful with the charge light. it relies on the resistance of a bulb to sense the voltage, so if it's connected to an LED, the charge circuit won't work correctly. you'll need to add a resistor in parallel to correct it.

I have done the charge light seperatly, using one of the original 12v from the normal dash, just because of this issue.

[Dan16v]

iirc, you need to be careful with the charge light. it relies on the resistance of a bulb to sense the voltage, so if it's connected to an LED, the charge circuit won't work correctly. you'll need to add a resistor in parallel to correct it.

I have done the charge light seperatly, using one of the original 12v from the normal dash, just because of this issue.

It turns out that this speedo doesnt have all the functionalty of the acewell unit and doesnt have a scaling function of the tachometer

Does the standard coil output 1 pulse per engine revolution? The only other thing I could think oif was to wrap a wire around one of the HT leads to see if that fixes it.

[Ethel]

Standard coil puts out 2 sparks per rev (each of the 4 cylinders fire once every 2 revs, that's one every half rev)

You're stuck in either side really:

A single cylinder 2 stroke engine fires once per rev; your coil fires twice per rev and each plug fires once every 2 revs

You could try wrapping the the sensor wire round 2 plug leads, otherwise you might need to resort to a bit of electronic jiggery pokery.

Any piccies or a link to what we're playing with?

[Dan16v]

Standard coil puts out 2 sparks per rev (each of the 4 cylinders fire once every 2 revs, that's one every half rev)

You're stuck in either side really:

A single cylinder 2 stroke engine fires once per rev; your coil fires twice per rev and each plug fires once every 2 revs

You could try wrapping the the sensor wire round 2 plug leads, otherwise you might need to resort to a bit of electronic jiggery pokery.

Any piccies or a link to what we're playing with?

what a pain, the seller said it has worked on 4 cyclinder bikes which use 2 or 4 coil packs, with it linked directly to one of the coils.

Its item 370312312291 on ebay, everything else seems to work ok, its just the double counting. The acewell equivalent has a scaling factor built in for this exact reason!

It sounds like the unit is only any good for a 2 stroke motorbikes

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