Late model speedo refurb - help needed please (1 Viewer)

Joined
Jul 4, 2010
Messages
308
Location
Brisbane, Australia
 
 
Hey mudders,

I'm fixing up my speedo and needing some help and advice please. I've gone through the odometer threads (and they were very helpful) but I have a couple of unanswered questions, and here are some pics to help:

1. My speedo from an 84 BJ42LX front and back


2. Speedo from and an 83 FJ40LX front and back


My unit is missing the bit that fits into the back of the housing above the speedo - the piece with the white and black wires. I assume it is some form of light? Why would the PO remove this?

Aside from the "JO6" label on the face of the '83 speedo and "JO7" on the face of the '84 speedo - they look identical. Does anyone know if there are any other differences between these two units that would cause me hassles if I swap bits from one to the other?

And how do I remove the speedo indicator needle without trashing it?

Thanks,
 
Joined
Jan 28, 2007
Messages
81
 
 
You can remove the needle by pulling straight up with slight counterclockwise twist. I believe the white and black wires are a VSS (vehicle speed sensor) but I'm not sure how it works.
 
Joined
Nov 23, 2008
Messages
3,190
Location
Richmond B.C.
 
 
Lx does not have speed buzzer they were only on JDM models if the speedo had a speed sensor the numbers would be painted yellow from 100 kmh and up ,as TJS8040 said is probably VSS
 
Joined
Jul 4, 2010
Messages
308
Location
Brisbane, Australia
 
 
Thanks again all - I was going to remove the "light" from the spare cluster and fit it to mine - I can see bugger all at night on my speedo cluster :) But clearly that would have been a waste of time since it is a VSS :doh:

Folkert, interestingly the FJ's cluster does not have yellow speed writing either.

Much obliged.
 
Joined
Jul 10, 2004
Messages
477
 
The wires are for the EC "computer" speed sensor that controls the VSV on petrol models... yours being an 42LX wont have that.

The speed sensor sends a forward motion signal to the "computer" which when senses above a certain speed and opens a VSV allows the fuel vapours, from the charcoal canister to feed into inlet manifold and be burnt in the combustion cycle.

Emission systems vary but that is the basic principal.

On my AUS '84 the sensor is a magnetic pick-up on the speedo gauge needle.
 
Joined
Oct 19, 2010
Messages
664
Location
Amsterdam, the Netherlands
 
 
Thanks again all - I was going to remove the "light" from the spare cluster and fit it to mine - I can see bugger all at night on my speedo cluster :) But clearly that would have been a waste of time since it is a VSS :doh:

Folkert, interestingly the FJ's cluster does not have yellow speed writing either.

Much obliged.
yes, not sure when they did that, I also have seen JDM pics of speedos with the yellow lettering.. I just dont have it..
7.jpg
 
Joined
Dec 27, 2006
Messages
469
Location
Queensland, Australia
Best way to improve lighting in the dash cluster is to remove the shields over the 2 lights either side of the speedo, do this and put in some LEDs in place, million times better.;)
 

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