How do you check speedo transducers.

[Chucky]

Not sure if this is the place for this questions, feel free to move it if it isn't.

As the title say's. How do you check the speedo transducer that screws on the transfer case?
I have pulled the transducer off and attached a drill onto it and the speedo still don't work so I know the problem isn't in the t/c.

What I've done so far is check all fuses and fuse links, visualy check most of the wiring up to the back of the speedo, the bit's I didn't check seemed to be straight wiring in the loom, pulled the dash out and check visually for broken solder etc on the instrument cluster circuit board. So far all seems good.
I sometimes get some movement out of the speedo and it did start working again for no apparent reason for a couple of days. The only thing I haven't checked is the transducer and I don't want to spend a fortune on a new one if it ain't broke. And I'm getting tired of using the GPS for checking my speed.

All ideas will be considered.
Thanks
Chucky

[460cixy]

use a multi meter and spin it by hand you should get a reading. if in doubt take it to an auto sparky and im sure one will test it for nothin as long as its allready out of the car. basicly its spose to produce a small curent when spun the faster it spins the more curent

[460cixy]

use a multi meter and spin it by hand you should get a reading. if in doubt take it to an auto sparky and im sure one will test it for nothin as long as its allready out of the car. basicly its spose to produce a small curent when spun the faster it spins the more curent

[Area54]

Some are an inductive transducer - the unit you have may need voltage supplied to it to return a signal.

What sorta rig is it?

[460cixy]

i was not aware of other types.

[Chucky]

sorry I should have put down what I drive,

It's a 80 series cruiser. Part time 5 speed diesel.
I've done the ring around today and the cheapest I can get is $100. So I want to make sure that this is the problem.

Thankls again for your help.