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If I go hunting a tranny control unit, what years am I looking for? Again, this one is an '89, 6 banger.
Oh, I forgot: the previous own said the guy he bought it from put a '92 engine/tranny/x-fer...

Using the cig lighter socket wall as my ground I tested these solenoid wires from the TCU connector:
C14: 13.2 ohms
C15: 12.9 ohms
C16: 12.9 ohms

You mean checking C14 wire out of the TCU? Or ...?

Well too late now, I'm not removing the pan again w/o due cause. I suppose I could try tripping it from the C14 wire at the TCU?

Rechecked them right at the solenoid when i had the pan off. TC solenoid had slightly less ohms than the other two; it was 9.8 and the others were 11.2. I would have tested them with battery voltage...

The torque converter still not locking up.
I did the following:
1. Changed tranny fluid and filter.
2. Replaced ground (negative) and positive battery cables with new 1GA cables with soldered on...

Still no joy. Looking into re-replacing the TPS. Anyone have a favorite brand to look for? Advance Auto counter-man claims BWD brand that they sell is the exact part I would get if I bought one from...

1989 XJ AW4.

I replaced a bad TPS with a Duralast brand (Autozone). Now the AW4 won't shift into TC lockup. So, I then re-placed the Duralast with the bad old one. Still no lockup. So put back the...