Rev counter help please

Rufio-plb · 05-10-2008, 15:55

Had another go with my external rev counter... and no didnt suceed. Going to give it one last go and then give up. So annoying as i bet its something really silly im doing. Anyway here are some pictures to ask you which wire does it connect to the ECU. Power is working just no response with the ecu.
Wires everywhere

Is the wire i connect in this block, the square one??

I have wired to the Blue wire 2nd bottom from the left, but this did not work. As you can see there are also green wires that i have read people have wired too. There was four in this set and also found that there was another green wire but covered over in a thick black "overcoat" Is it in this set of wires? if so which one?

Paul · 05-10-2008, 18:54

Looks a right mess.

Please give us/me more info

What car?
What engine?

Dom · 05-10-2008, 19:44

If its a vauxhall then its normally wired to a plain green wire coming from the main engine ECU

Mark_F · 05-10-2008, 19:45

Woah.. Rev counter signal is green that runs to the clocks' loom.

Paul · 05-10-2008, 19:49

Why not just swap your clocks for one with a rev counter?

CoupeUK · 05-10-2008, 23:07

Looks to me like a 5dr CorsaB. 1.2/1.4?

As said, green from the ECU, there maybe one taped to the loom behind the clocks, failing that I would have thought that you could take a feed from the green at the coil?

Rufio-plb · 06-10-2008, 08:30

Yeah its a 1.4i corsa b 5dr. Where abouts in the engine is the coil? i Dont have a taped wire behind the clocks that is green. I thought it was a green wire going into one of those plugs? so i take it its not? Which one is the "clocks loom". Thanks for your helps.

Quote:

Why not just swap your clocks for one with a rev counter?

Didnt want to change milege and things... Just as easy to get an external one.

Paul · 06-10-2008, 10:12

So you have taken your old clocks out, and looked at the plug in the back and there is not a green wire?

Rufio-plb · 06-10-2008, 19:05

Yeah not that i could see.

Paul · 07-10-2008, 12:26

Take another look mate, we are talking about the multi plug that plugs into the clocks.
Pull this out and look, or post a pic of it here

Rufio-plb · 08-10-2008, 12:20

ok i managed to find that green wire. joint the cable to that and ran cable to the external revcounter and clipped in.... still nothing. Do i not need to touch the ecu at all, as in link another wire to a cable in the ecu?

Rufio-plb · 08-10-2008, 12:37

IT WORKS!!! Thanks for help .

lee-170 · 15-10-2008, 14:41

how did you get it working mate

Rufio-plb · 15-10-2008, 17:57

power and ground straight forward. Then the external wire that goes to clocks... I thought to connect to something from ecu but just connected straight to the back of clocks where it plugs in 5the from the left pin.

***Astra Dan*** · 15-10-2008, 18:20

For future info, rev counters take the signal from the negative terminal of the (single) coil.