Speedo cable

[JOHNS]

When I stripped my car for bodywork restoration there was no speedo cable attached to the drive. My car is one of the last to be built and I am the only owner. Were later cars fitted with a different electonic system.

[new to this]

We bought a speedo cable from Peter LD parts his were a bit shorter in lenght,being that bit shorter makes fitting the cable much easier,i think auto and manual are different lenghts ours was manual we also used his angle drive

[Lingen]

.JohnS.
Triumph never fitted an electronic speedometer in the Stag. Are you saying that yours has worked ever since you bought it new, without a cable?
Mike.

[JOHNS]

I took my car off the road in 1987. Up until then it was run and MOT'd. I changed the clutch once but there definitely was no drive cable neither at drive end or speedo when I removed engine and gearbox for rebuild. I'll check speedo electric tomorrow.

[JOHNS]

Further to my previous post I have checked the speedo and I am really stuck for words. There was certainly no speedo cable when I started the strip down but I have no recollection of the cable being removed. See attached a picture of the rear of the speedo. I assume the attachment with the cable id tags is the 10v stabiliser. This is item No 53 on the wiring diagram. Can anyone advise it"s purpose.

SPEEDO.JPG

[JeffW]

Hi

It stabilises the voltage for the Temp & Fuel gauges so they read correctly. Someone will be along to give a more technical response!

Jeff

[Goldstar]

steady 10v for those instruments

[StagJonno]

steady 10v for those instruments

Not quite "steady" if you put a multimeter on the output. It contains a bi-metallic strip with a heating element so it switches battery voltage on and off proportionately to achieve 10V average. As the Fuel & Temp gauges operate using heating elements with bi-metallic strips connected to the pointers, the action is well damped, so it works quite well, mostly.

Was quite innovative 50 - 60 years ago. Some folk have replaced the original with a 10V solid state regulator - each to their own.

[DJT]

http://www.britishv8.org/articles/mgb-voltage-stabilizer.htm

[Goldstar]

Not quite "steady" if you put a multimeter on the output. It contains a bi-metallic strip with a heating element so it switches battery voltage on and off proportionately to achieve 10V average. As the Fuel & Temp gauges operate using heating elements with bi-metallic strips connected to the pointers, the action is well damped, so it works quite well, mostly.

Was quite innovative 50 - 60 years ago. Some folk have replaced the original with a 10V solid state regulator - each to their own.

Pretty sure my digital one is steady