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1998 Jeep Wrangler P0743 Code: TCC Solenoid Causes Fuse Blowing After Transmission Rebuild

Model: 1998 jeep wrangler Fault Code: P0743 Posted: 2017-08-15 20:50

I own a 1998 Jeep Wrangler that recently had its transmission rebuilt. After reinstallation, the vehicle now blows the fuse that controls the Torque Converter Clutch (TCC) solenoid as soon as the key is turned to 'Run' position. The fuse located in the glove box blows consistently when the TCC solenoid is connected and powered. I performed an ohm test on the solenoid itself, which reads 0.8 ohms at 200 ohm setting on my multimeter. Is this within acceptable range for a 1998 Jeep Wrangler with a 32RH (A904) transmission? Additionally, I've confirmed that there is 12 volts present at the harness connector when the key is in the 'Run' position, but the fuse still blows immediately upon connection. Has anyone encountered this issue or have reliable specifications for TCC solenoid resistance in this model?

Related fault codes
P0743
Comments (3)
Anonymous 2017-08-16 06:59

Could you confirm if your transmission is a 42RLE? I'll need to verify the official ohm specification for the TCC solenoid. Also, have you checked continuity from the wiring harness to the solenoid and then from the solenoid to the Powertrain Control Module (PCM)?

Anonymous 2017-08-16 07:05

This is a 32RH (A90-4) transmission. The fuses are fine until the TCC solenoid is connected and the key is turned to 'Run'. Once in that position, the fuse in the glove box blows immediately. I've confirmed there's 12 volts at the harness connector — this suggests power is reaching the solenoid, but the circuit is still causing a short or overload.

Anonymous 2017-08-16 08:32

I haven't found a reliable or credible ohm specification for the TCC solenoid in official service manuals. To troubleshoot further: when the solenoid is unplugged, did the test light stay on or did it blow the fuse? This would help determine if there's a short to ground in the harness or at the solenoid itself. I also recommend probing the wiring from the TCC solenoid back to the PCM for any potential short-to-ground faults.