rev counter wiring

[rpgrainger]

right i have swapped the dash for the pre 74 one but on the rev counter for the pre 74 it has two white wires one with a grey stripe and the later one only has one white wire.....now what is needed to get the rev counter working<br>
Many thanks<br>
Rob

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[Jon Tilson]

in the Haynes manual wirong diagram somewhere Rob.<br>
The grey+white goes to the + side of the coil IIRC, same as it does now.<br>
<br>
Jonners

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[rpgrainger]

Now the rev counter could be broken as it was bought as a complete dash.....but the old wiring was still on the back of the dash and there is two white wires on the back of the early rev counter<br>
Cheers<br>
Rob

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[Jon Tilson]

I find these old rev counters sometimes need a tap on the glass to get them to wake up, especially after a long period of lack of use.<br>
<br>
Jonners

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[Triumph1300]

If it's got 2 white wires on the back, then it needs wiring in series between the coil and the distributor.<br>
It's a different wiring circuit on the very early tachos<br>
<br>
You wil then from memory, also need an ignition supply and earth to the tacho<br>
<br>
Ring if you need to know more<br>
<br>
BWJ

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[rpgrainger]

it has the earth and the live as per the later rev counter.......<br>
on the later rev counter it has one white wire poss from the pos side of the coil.....where would the other white wire have come from on the early rev counter<br>
Cheers<br>
Rob

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[dollyboy]

sprint/HL wiring for the tacho is red wire to the bulb, black to earth of case of dial. black/white to bullet connector (from coil) and two mystery greens that are the ignition live I think.<br>
<br>
just had a discussion on CT board about this and also have dial/dash loom in my garage here, just not sure where the greens go. <!--EZCODE EMOTICON START :rolleyes --><img src=http://www.ezboard.com/images/emoticons/eyes.gif ALT=":rolleyes"><!--EZCODE EMOTICON END-->

<p>project orange - gradual progress<br>
project STEALTH - PASS!!! <br>
project white - AAARGGGHHH!!! too many cars!!!</p><i></i>

[rpgrainger]

yes i have all of the above wires but on the back of the early rev counter there are 2 bullet connectors that both had white wires on them one with the grey stripe and an all white one<br>
Cheers<br>
Rob

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[dollyboy]

Id say in that case (if you look at the back of the dial with the pair of terminals at 12 oclock) the bullet connector on the left should be the black/white and the one on the right should be the greens (or white?) ???

<p>project orange - gradual progress<br>
project STEALTH - PASS!!! <br>
project white - AAARGGGHHH!!! too many cars!!!</p><i></i>

[rpgrainger]

on the original rev counter<br>
two greens on a spade conector<br>
red to the bulb<br>
black to the case on a spade<br>
white and grey to a bullet connector<br>
on the pre 74 rev counter<br>
all as above but another white wire on a extra bullet connector<br>
this is not a problem of where the existing wires go but where the extra bullet connector with a white wire should be connected to<br>
Cheers<br>
Rob

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[rpgrainger]

ok here is a pic<br>
1 and 3 have white wires connected male and female bullets<br>
2 has the two green wires<br>
4 is the earth<br>
<!--EZCODE LINK START--><a href="http://<!--EZCODE" target="top"><!--EZCODE IMAGE START--><img src="http://i25.photobucket.com/albums/c62/r ... <!--EZCODE IMAGE END--></a><!--EZCODE LINK END-->

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