How to test Hall sensor off car? (700)

[M.J.]

Hi

I have a 740 GLE which died on me on the motorway. By the symptoms
(no reading on tacho when cranking engine/fuel pump not working) I'm
assuming that the electronic points/Hall sensor have failed.

I have removed the distributor and noticed that the black plastic
connector has disintegrated, but as far as I know, the connections
were/are still ok.

Does anybody know of a way to test it with the unit off the car?

any help gratefully received


Mick

 

[jay adams]

Pretty simple,really. Attach red wire to 12v (B+),black to ground (B-),
center green is signal. I use a test light from green terminal to ground.
Rotate the distributor shaft, and a good Hall switch will turn the light on
and off.

 

[M.J.]

Jay

Thanks very much for that info - I was hoping it would be that simple

MJ

 

[radietz]

Jay

Thanks very much for that info - I was hoping it would be that simple

MJ

BTW the plastic insulators are available separately from the dealer and
are quite cheap.

Bob