Tach Wiring

[genoredstar]

Does any body know how to test an electronic tach. I've got an E tach from an mr that i want to install in my r model. I think i have all the wiring right but don't know if my sensor or pickup is functioning or if the tach is bad. I've got the pos and ground on the tach hooked up and two leads to the pick up on and have a little clearance from the flywheel., but no needle movement. I get a little bounce when it wakes up to voltage initally but nothing later when engine is running

[Rob]

Does any body know how to test an electronic tach. I've got an E tach from an mr that i want to install in my r model. I think i have all the wiring right but don't know if my sensor or pickup is functioning or if the tach is bad. I've got the pos and ground on the tach hooked up and two leads to the pick up on and have a little clearance from the flywheel., but no needle movement. I get a little bounce when it wakes up to voltage initally but nothing later when engine is running

You need a pulse generator outputting about 5VPP signal varying in frequency to check the tachometer independent of the sensor.

If you want to box it up and send it to me I'll check it out for you. I have a test jig for doing what you need.

Rob

[genoredstar]

You need a pulse generator outputting about 5VPP signal varying in frequency to check the tachometer independent of the sensor.

If you want to box it up and send it to me I'll check it out for you. I have a test jig for doing what you need.

Rob

Rob,

Playing with a ground wire if i pulse one of the signal terminals i get movement on the needle . Am i correct in thinking its the pickup?

[Rob]

Rob,

Playing with a ground wire if i pulse one of the signal terminals i get movement on the needle . Am i correct in thinking its the pickup?

It could be and is the least expensive part to replace.

Rob