The New Circuit Master Automotive Circuit Tester

• "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