how to wire a rev counter? i am mega confused, help please!!

24th January 2011, 23:07

ok i bought a rev counter of ebay, it has three wires cumming from it

RED(+)
BLACK(-)
BLUE (signal)

i know where to wire red and black,
but i dont know where to wire the signal wire to

i have been trying to find out all day

if anyone could help me that would be great

24th January 2011, 23:48

on a corsa it goes on a green wire comeing off the coil pack from what i can remember mate if that helps

25th January 2011, 00:21

Assuming your " '98 Saxo X VTR Replica " is a 1.1 HDZ engine - you need to take a feed from pin 6 on the ECU according to that ECU diagram. It should be a green wire labelled 425. Splice this wire to a connector then to your blue wire of the counter. Test it in the engine bay before wiring it through to your dash to make sure its working

25th January 2011, 07:30

cheers will look at it later amd see if it works

25th January 2011, 17:33

ok i have wired it to the wire cumming of that pin, i get a reading from the rev counter but its not true, the car ticks over at 500rpm and the limiter kicks in at 4?

how do i get a true reading?
thanks

25th January 2011, 17:36

Try wire counter earth (black) to ECU earth (pin 2) ..

25th January 2011, 17:39

ok will give it a go tommora morning,the black goes to the battery negative side, or does it have to go to pin 1?

25th January 2011, 17:44

Pin 2 is earth sorry... not pin 1!!

Don't hold me too it though, ive never done it, im only going on wiring diagrams. Look after your ECU.

25th January 2011, 17:48

Blue to Pin 6 (Green)
Black to Pin 2
Red to Ignition Live (Ignition switch?)

Thats how I would try it. If it doesn't work, id leave it how it is and fit a variable resister between Pin 6 and the counter so you can adjust it to how you want.