connecting rev counter on renault/volvo conversion ?!

[r5b18ft]

The revcounter on my Renault has 2 wires and there is only 1 wire from the volvo bulkhead plug to go onto the revcounter. How do I connect it ???

[ted clutch]

maybe one of the wires is an earth.

[ted clutch]

maybe one of the wires is an earth.are you using a renault dash?

[r5b18ft]

maybe one of the wires is an earth.are you using a renault dash?

yes.

I checked using a multimeter but neither of them seems to be an earth. Now what I'm thinking of maybe could be an earth taken off some other thing and earths only when ignition/engine is on. Don't know

[ted clutch]

on my volvo the single wire (think its grey/green) is a 12v square wave timed with the ignition.ive checked it with a hand oscilloscope. it traces to the back of the revcounter where the chip is. i think it just acts as a high/low signal to the chip and tracks away to earth through a pull-up resistor. dont know how the renault dash works. you could try pulsing a small current on and off to one of your wires and see if it moves the dial. try 5v to be safe.
i think they only work with the ignition on because thats where it derives the signal from.

[dave r5]

if yr using a renault dash
can u not just replace the the volvo pik up with a renault item
as the box is the same
unless internaly different

[r5b18ft]

if yr using a renault dash
can u not just replace the the volvo pik up with a renault item
as the box is the same
unless internaly different

revcounter signal comes from ECU.. I just need to know what to do with the 2 wires I have on my factory tacho.

[dave r5]

ooops sorry i miss read the post

i niked the ecu feed for my tacho but it wasnt a renault item

its 1 of them masive gay things

[blaze]

you need to find the pink wire with red trace if this is any help

[r5b18ft]

you need to find the pink wire with red trace if this is any help

some more info please !!!

isn't it the blue/brown wire ?

my rev counter is not connected yet as when I try to connect the blue/brown one strangely enough the fuel pump feed stops working .. so I figured out it is the wrong one!

[Iroll480]

The wiring diagrams can be found on the download page. According to the wiring diagram the pulse for the rev counter coming from the ecu is the blue/brown wire. A green/white wire is the + which it shares with the speedo.

[r5b18ft]

The wiring diagrams can be found on the download page. According to the wiring diagram the pulse for the rev counter coming from the ecu is the blue/brown wire. A green/white wire is the + which it shares with the speedo.

Does that mean I should connect the blue/brown to one connection and the green/white to the other connection on the rev counter ?

[Iroll480]

Isn't one wire for the bulb and the other for the pulse on the R.rev counter?

[Chesh]

You sorted this yet?

[r5b18ft]

You sorted this yet?

NO


still not running a tacho ...


any help ???

[Chesh]

Well it might not be any help at all but ive recently dropped a b18ft into my clio 16v and the rev counter works by taking the pink (i think) wire from the centre of the volvo engine loom multiplug to pin 8 (i think lol) on the multiplug on the back of the clocks.

Im presuming youre putting it in an r5 and therefore using the r5 clocks so will probs be different but thought this might be some help

I will double check on the things i am not sure about lol