Modulator Circuit Test
- Using a DVOM, measure resistance between terminals No. 1 and 3 of modulator. This measures resistance of release solenoid valve. Resistance should be 3.8-4.8 ohms. See Figure .
- Measure resistance between terminals No. 2 and 4. This measures resistance of build-up solenoid. Resistance should be 4.5-5.0 ohms. If resistance is not to specification, replace modulator.