944S ref sensor testing

[944Nick]

I'm trying to test my speed and reference sensors on my 88 944S and im looking at guides and I couldn't find the plug so im testing the computer plug. Only problem is my plug has 3 rows and doesn't have anything in spots 25 or 27. Does the S have them in different spots on the dme plug?

[944 Ecology]

Pins 47 and 48 ... see attachment

[944Nick]

Originally Posted by 944 Ecology

Pins 47 and 48 ... see attachment

Thanks, is there a test I can do if I dont have an oscilloscope?

[944 Ecology]

You can test for continuity, but, as the page says, "This test can only be performed with an oscilloscope."

Digital Storage Oscilloscopes are becoming much more affordable, check this one out, which should be adequate...

https://amazon.com/Hantek-Oscilloscope-Channels-Handheld-Portable/dp/0201336421

[curtisr]

Originally Posted by 944Nick

I'm trying to test my speed and reference sensors on my 88 944S and im looking at guides and I couldn't find the plug so im testing the computer plug. Only problem is my plug has 3 rows and doesn't have anything in spots 25 or 27. Does the S have them in different spots on the dme plug?

Nick, can I ask why you're testing these? Is it because of a no-start condition? Have you tried the bench test as outlined in Clark's Garage.