Club G40 Forum
Technical => Electrical => Topic started by: Freddy77 on July 30, 2014, 09:27:48 pm
-
I have ordered a tim rpm gauge for my mk2 conversion,
as it didnt come with rpm clocks and I want to retain the shell mileage
on the clocks as is very similar to the engine,
I am a bit unsure of how to wire it up, if anyone has fitted a similar item any help
would be ideal, im assuming it will come with a basic wiring diagram but I imagine
its a generic one for any car,
many thanks for any help
fred
-
you have a made a bit of an own goal.
To retain the milage you just remove the left hand side of your original clocks- put them in the rev counter replacement clocks.
The signal for your gauge will come from the ECU- not coil. if my memory serves me right its black/red on yellow block connector
-
Pin 10 (Red/Black stripe) of the clocks is the rpm signal input from the EMS ECU. Use this to power your rev counter.
Alternatively you can use the coil drive signal (pin 2 of the coil connector, black wire/green stripe) which is fed by EMS pin 25. I'd not use this route for two reasons:
1. You risk the rev counter attenuating the drive signal to the coil.
2. You've got to run a wire through the bulkhead from gauge to coil or EMS.
-
Andy my plug to my clocks is different to a mk2f it has 14 pins however pin ten is
A blank space, any other placea I can take the same feed from?
Cheers
-
ive looked at a wiring guide and found which pin is the rev counter one, I connect the red wire to that and the gauge twitches, however I have no idea where to put the green wire, the black goes to earth
confused is not the word
-
what?
red goes to positive, black to earth, green will go to the tach signal - which andy confirmed was the black/red from the ECU, which can be found at pin24 of the ECU.
Ive had a bit of a check now on what i said earlier, the wire from the ECU should be green- when you have the connecting plug connected the wire will change to the red/black wire.
you should be able to get it working from this