Smiths rvi1003/00

[colonel mustard]

I am trying to connect up the rev counter I have in stock. It is a smiths RVI1003/00 on negative earth. Looking through the wiring diagrams on Marks other website I have sorted:
Green cable to The feed (a4 on the fuses)
Black cable to the earth terminal
Red/white to light in rev counter

The question the impulse lead is quite meaty compared to the white wire in the auto sparks loom. Do I
A/ remove the existing impulse cable (blue and red) and reroute the wire cable provided in the loom or
B/ not my first option but bullet connect the existing impulse wire and do the same with the white loom wires provided?

Is there any issue with removing the existing impulse cable and replacing with the white looped loom cable?
Also there does not seem to be a location where I can connect the earth for the casing to? Do I need to piggy back the earth connections provide for the oil temp and temp gauges?
Thanks in advance

[Polarsilver]

Your white Loop Wire looks to be about the correct size & it is directional in its supply ( the original Smiths Kit wire supplied had a Black Band on one end of that Loop WIre ).. cant remember what that direction is other than if your Needle Reading is not working just reverse the wire direction.. i also added an earth to the tacho pot ,, best i remember on the main Mk1 Site is the Rev Counter wireing drawing.

[colonel mustard]

Thanks,
So I will remove the red and blue impulse wire, replace with the white loop wire in the loom (will try and find out the direction, if possible).
Add an earth cable to the unit strap and try and interlink with the other gauges or just take a point on the bulkhead?
Thanks again

[colonel mustard]

Hopefully this is ok?
One further question! Does the impulse wire need to be tight within the terminal ie it is secure just not clamped in tightly as the cable that I have removed was a larger core?

[Polarsilver]

That White Loop now looks all ok to me .. add your needed earth to the earth multipoint stud on the back of Speedo .,Or wherever is suitable for you to earth onto the Bodyshell. just keep it all nice & neat

[docka]

Does it need a separate earth?
Would the negative terminal not be grounded to the case of the gauge already inside?
Suppose a continuity measurement with multi meter would prove...