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E4OD wiring diagram

36831 Views 10 Replies 6 Participants Last post by  danjreed
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.
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If you have the right wire and everything in the torque converter lockup system works, grounding the wire in park will lock the torque converter.

Locking the torque converter in park causes absolutely nothing to happen!

If you were to ground the wire with the trans in drive AND YOUR FOOT HARD ON THE BRAKE it will stall the engine if everything is working.
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