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Posted by: Jackba Jan 8 2019, 04:12 PM

I somehow pulled the 3 wires out of the plug that connects to the trigger points. One wire is darker than the two others. Does anyone know which wire goes where in the plug?
Thanks in advance,
Jack

Posted by: Jackba Jan 8 2019, 04:28 PM

Here is a photo:

Posted by: mgphoto Jan 8 2019, 04:39 PM

I believe the center is ground, the other 2 are the contacts.
Use an ohm meter to determine which is the ground, the wires are all supposed to be white.

Posted by: Jackba Jan 8 2019, 04:45 PM

Once I detect the ground are the other two interchangeable?

Posted by: JeffBowlsby Jan 8 2019, 06:41 PM

There is no 'ground'. Test the wires for continuity at the ECU plug. Wires 12, 21, 22. See attached diagram. Their order is critical.


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Posted by: Jackba Jan 8 2019, 07:09 PM

Well, I checked to determine which of the 3 was the ground wire and was surprised to see that all three are grounded...

Posted by: Jackba Jan 8 2019, 07:36 PM

Thanks a million Jeff!

Posted by: JeffBowlsby Jan 8 2019, 08:04 PM

Ooohhh thats not good. wire 12 is common, but I dont think its ground, unless the ECU is telling it is ground. The trigger points are just two back to back switches, switched by the cam on the dizzy.

Posted by: Tbrown4x4 Jan 9 2019, 10:04 AM

Did you disconnect the ECU and just check which wires go to pins 12, 21, and 22 in the ECU connector?

Posted by: Olympic 914 Jan 9 2019, 10:14 AM

Great diagram.

Posted by: jack20 Jan 9 2019, 11:21 AM

Thanks for the question. I haven't done anything yet. I hope to pull out the ECU and check continuity this weekend. I can't imagine there is anything seriously wrong because the car was running prior to pulling the distributor to change points and condenser. The leads pulled out of the plug during this process. Something simple turned into a PITA...

Posted by: Tbrown4x4 Jan 9 2019, 01:11 PM

I didn't mean to imply anything was wrong. I just meant you need to isolate the 3 wires electrically in order to trace them to their proper pins at the ECU connector.

Posted by: jack20 Jan 9 2019, 01:28 PM

Oh, got it. I was referring to Jeff's comment that has me a bit worried given his expertise on the system. I just hope it's nothing serious.