<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Deib</div><div class="ubbcode-body">How do I trouble shoot the TC circuit without a scan tool?
I know there is the purple wire with yellow stripe, it should lock up if I ground that.
So where does it get it's power? Is there more than one wire that controls or supplies power to the TC convertor.
I am looking for ways to test the TC circuit inside the tranny so I can figure out if my problem is internal or external. </div></div>
<span style='font-size: 14pt'>Just wondering what the problem is--no TCC lock? While lockup is PCM controlled, the pump valve is what allows lock and unlock of the converter. If the clutch has worn out it won't lock either. Just like the clutch in a manual transmission, the clutch surface will wear out. It's possible for all to work as it should, but just be worn.</span>
I know there is the purple wire with yellow stripe, it should lock up if I ground that.
So where does it get it's power? Is there more than one wire that controls or supplies power to the TC convertor.
I am looking for ways to test the TC circuit inside the tranny so I can figure out if my problem is internal or external. </div></div>
<span style='font-size: 14pt'>Just wondering what the problem is--no TCC lock? While lockup is PCM controlled, the pump valve is what allows lock and unlock of the converter. If the clutch has worn out it won't lock either. Just like the clutch in a manual transmission, the clutch surface will wear out. It's possible for all to work as it should, but just be worn.</span>
