Volvo RWD 140-160 Forum

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Coolant System Diagnosis 140-160 1972

The stabilizer can fail in 3 ways:
- it sticks at 12 volts output
- it sticks at 0 volts output
- it regulates; but, at something other than 5.1 volts.

The stabilizer is clearly not stuck at 0 volts. If you used a 6 volt light bulb and the light bulb did not burn up, then it clearly is not stuck at 12 volts (the filament would have burned up pretty quickly). So, if the light level of the bulb seems close to normal the stabilizer is probably working at close to it rating of 5.1 volts RMS. If you have a digital multimeter that reads true RMS (or know somebody who has one) you can use the multimeter to measure the effective output of the stabilizer. Cheap multimeters generally do not read true RMS.






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New 1 Coolant System Diagnosis [140-160][1972]
posted by  chef blue  on Wed Dec 2 09:20 CST 2020 >


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