Preliminary Checking Procedure

The purpose of the preliminary checking procedure is to isolate external (electrical) problems from internal (electrical or mechanical) ones.

Important:
- Use only a scale type ohmmeter. High impedance type ohmmeters and those with a digital readout will not work.
- An ALDL scanner may be used to verify the electrical circuit. Remember, a completed circuit does not indicate that the solenoid will apply.
- Do not bench test using an automotive type battery. Accidentally crossed wires will damage the internal diodes of the TCC solenoid.