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50 years of Mercury Cougar 1967/2017
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1,255 Posts
Discussion Starter #1 (Edited)
How do I test the crank Position sensor to see if a signal
is being sent to the computer?

No spark at the plugs.

I want to check for a broken crank sensor.
 

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50 years of Mercury Cougar 1967/2017
Joined
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1,255 Posts
Discussion Starter #2
Fixed.


What's the first thing anyone should check first?








Loose wire.

Rick
 

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Premium Member
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343 Posts
Since you brought up the subject... What is it exactly that fails on or going to the sensor causing the no start condition?

Reason I ask is my cougar would crank, and not turn over last week. I unplugged the crank sensor and plugged it back in; problem solved. I cleaned the connection with contact cleaner after as well. From what I could see the connection looked clean though so I don't think that was the issue.

Is it just lose wire? It's in a tight spot so I haven't taken a really good look into it yet.... Would like to fix it so this doesn't happen again. So far its been fine though
 

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Super Moderator
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16,751 Posts
I'm betting the wires near the end of the pigtail are corroded and/or brittle causing an intermediate open or short. When you unplugged and replugged it you probably got the wires in such a position that they regained good contact, ala the wiggle test.

I had this happen to me a few years ago on my original 96/7 harness, had to push the car back home two blocks from where it died :rolleyes:
 
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