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Wiring in a genuine austin/rover tachometer


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#1 adcyork

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Posted 09 January 2007 - 10:28 PM

My mini currently has a 2 clock speedo and fuel/temp dash and i have just bought a 3 clock walnut dash and an austin/rover tachometer. The mini i'm fitting it into is a 1990 studio 2. I've worked out from the wiring diagram that it takes a feed from the coil but which pins is it on the tacho? Also which are for the back light in behind the tacho and where on the 2 clocks do i take the feed for the back light?

i've attached some pictures and numbered the pins to make it easier to discuss on here, i'm unsure wether number 5 relates to anything?

any help would be much appreciated guys as i'm not great at electrics.
thanks

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Edited by adcyork, 09 January 2007 - 10:42 PM.


#2 Bungle

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Posted 09 January 2007 - 10:57 PM

the wiring diagram in the Haynes manual should help

i dont have one near me :'(

#3 fikus01

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Posted 09 January 2007 - 11:02 PM

under your dash there shud be 2 spare wires, a green/orange spade connector (goes to no.4) and a white/black bullet connector (goes to no.3)

you need to earth No.1 and the other 2 dont do anything.

put a light in urself and take power from the bottom fuse of the fuse box, thats sidelights. just earth it with the clock!!

usually the clocks come as a 3 part set and have a whole load of err kinda wiring on the back that connects them all together, supplies power, earths, lights, etc

#4 Dan

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Posted 10 January 2007 - 03:49 AM

The best thing is to get the PCB for a three clock as Fikus01 says, it screws to the rear of the clocks and carries the earth and bulb holder. Fitting a bulb holder without this is tricky. The earth is easy, you just need an eyelet on a wire screwed under the terminal and fix the other end to earth with the main 2 clocks in the same way at one of the main instrument earth terminals. The bulbholder will be tough though. You may end up having to solder some wires to one and wedge it in place.

#5 adcyork

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Posted 11 January 2007 - 12:11 AM

under your dash there shud be 2 spare wires, a green/orange spade connector (goes to no.4) and a white/black bullet connector (goes to no.3)

you need to earth No.1 and the other 2 dont do anything.

put a light in urself and take power from the bottom fuse of the fuse box, thats sidelights. just earth it with the clock!!

usually the clocks come as a 3 part set and have a whole load of err kinda wiring on the back that connects them all together, supplies power, earths, lights, etc


Thanks for that, most helpful.

does that tacho not have built in back light? if not then couldn't i just solder 2 wires either side of one of the backlights on the 2 clocks and use that to power a bulb in a bulb holder on the back of the tacho?

#6 fikus01

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Posted 11 January 2007 - 06:02 PM

no its not on there unless the pcb is, that square at the top is where it would go, just shoving a bulb in there with 2 leads on it shud suffice.

#7 cgraner

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Posted 02 September 2010 - 09:59 PM

under your dash there shud be 2 spare wires, a green/orange spade connector (goes to no.4) and a white/black bullet connector (goes to no.3)

you need to earth No.1 and the other 2 dont do anything.

put a light in urself and take power from the bottom fuse of the fuse box, thats sidelights. just earth it with the clock!!

usually the clocks come as a 3 part set and have a whole load of err kinda wiring on the back that connects them all together, supplies power, earths, lights, etc




Please fill us on on where the green/orange spade connector (goes to no.4) and a white/black bullet connector (goes to no.3) run out to and connect to. I think one goes to the Coil + connector and the other maybe goes to the switched voltage from the key switch.




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