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`The New Circuit Master` Automotive Circuit Tester
Toolsource #58416
Manufacturers Part Number #21700		 $15.25
S And G Tool Aid
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  • "Circuit Master" is the modern universal circuit tester for all vehicles. Use to test all primary electrical circuits plus any on-board computer systems.
  • Test computer circuits without fear of causing damage to expensive electronic components. Completely safe to use on microprocessor control modules.
  • Operating range from 3-15 volts. Current draw is less than 21 milliamps at 12 volts D.C.
  • Long life LED glows when voltage is sensed at probe and indicates polarity:
      Red = + (Positive)
      Green = - (Negative)
  • Use to locate shorts, opens and intermittents.
  • Made of high impact chemical resistant plastic.
  • Supplied with a 4 foot ground wire.
  • All solid state construction.
  • "Circuit Master" is supplied with Protect-A-Terminal, Probe Adapter (Part No. 21713), which will not deform sensitive female terminals at computer connections.


    • Tool Aid 21700 "The New Circuit Master" Automotive Circuit Tester
    This product was added to our catalog on Thursday 15 February, 2007.
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