Bench test rotation sensor?

[79Glastron]

I am wondering if you can bench test a rotation sensor for the oil injection system? I thought apply +12V to white wire, ground black wire. Insert + test prob on blue/white and - test prob on ground wire. You should be able to simulate the engine turning by using a strong magnet to the end of the sensor. Will that work? Also, if the sensor is connected to the module, should you be seeing a full 12V if you back prob the white wire when the key is on?
Thanks!

 

[Faztbullet]

Re: Bench test rotation sensor?

What problem are you having?

 

[79Glastron]

Re: Bench test rotation sensor?

Oil alert going off any time the engine is running. Cap float checked out fine, checked DVA at green wire from warning module, fine. I unplugged the white wire and checked for voltage and found 12.1 volts with key on. I plugged it back together and back probed the white wire, the voltage dropped to around 9 volts, is that correct or a failing module? I disconnected the blue/white and checked for the 5V pulse, no voltage. I verified the pump shaft is rotating. I tried a used rotation sensor and had the same results. Can it be bench tested without using the module?

 

[Faztbullet]

Re: Bench test rotation sensor?

Move the green wire on switchbox to a different cylinder and retest,if same results module has high percentage of being bad. If yours has the loose magnet in bushing if its turned wrong will cause this also.

 

[79Glastron]

Re: Bench test rotation sensor?

Are the voltages normal I tested? The CDI 144-4857-16, can it be retrofitted to work in my motor? B36XXXX?