Yes more speedo dramas...

[75Guy]

Well, after getting my speedo sensor from Dehne (thanks!) and turfing the offensively defective one I have discovered that yes this is not the problem.

I am starting to believe it is the speedo or the wiring, despite the fact that I have a continuous circuit to the sensor. Is there any useful advice anyone can give? I really need that speedo working for it to be registered.

Oh and it is the older style jaeger sensor without the jaeger box similar to late GTV6's.

Thanks.

[Sheldon McIntosh]

Isn't there some kind of connection under the rear seat on a 75?  Or is that the jaeger box of which you talk?

I don't recall the original thread, could you post a link to it maybe?

[dehne]

my race 90 originaly had the sender with 2 wires and i changerd it to the one with 3 i never found a box that the sender linked up with but when i put the 3wire one in i just had to earth it

[75Guy]

Isn't there some kind of connection under the rear seat on a 75?  Or is that the jaeger box of which you talk?

I don't recall the original thread, could you post a link to it maybe?

Well this is an early 75 so that means no three wire system, no jaeger box. Its almost exactly like a GTV6 if that helps.

Earths are all fine, I went through them all (I have a wiring diagram) and checked plus replaced those that seemed average.

Thus I believe it to be the instrument cluster.

So I guess I will be on the lookout for a new cluster. If anyone has a known working one let me know.

I am just reaching the stage with this that I want to give up but I know that once its on the road all the pain will go away.

[scott.venables]

I had a problem a while back with my cluster that was affecting the fuel gauge I think.  One of the earth circuits on the flexible PCB on the back had corroded.  It looked alright, but a multimeter showed a big resistance.  I fixed it with a jumper lead across the corroded circuit. Might be worth a shot

Cheers