speedo

[carracarra13]

Hi folks got a problem with the speedo in our 3.9 1990 RRC like it just stopped working , then started now stopped cant see any fuses blown or is it a new speedo cable? or are they electronic? any help would b e  cool thanks

[carls200tdi]

Hi mate i had the same problem they are electric they have a cable going from the transfer box to a transducer on the chassis rail which then sends the signal to the speedo head my problem was the live feed to the transducer.
I changed the speedo and the transducer but it still didnt work so did electric checks and found faulty live feed  wire to the transducer so replaced it with a new live feed working fine now hope this helps cheers carl

[Range Rover Blues]

If the speed transducer packs up you ought to get a fault on the engine ECU too, and the air suspension and cruise becasue they all use the same speed signal.  It's processed by a speed signal buffer, packaged like a relay.  You can check it's working using a multimeter or even a LED, don't use a bulb though as it will draw too much current.

[carracarra13]

Its not got air suspension and no ecu fault showing so will try the live wire option will let you know if ok thanks

[carracarra13]

live wire was how can I say this corroded very badly replaced also while I was underneath found loose earth so replaced and seems to be fine but need to get some one to do some welding cheap please when weather better so if you know any one who wants some cash after crimbo pm me PLEASE