HT-128 Handheld Wiring Analyzer

ht128 pair wired 740

Installed Wire Harness Testing Simplified!

Simplify your wire harness testing. The DIT-MCO HT-128 provides a superior solution for point-to-point continuity analysis. These lightweight, handheld units can serve your diagnostic needs from product development and benchtop testing through field support and maintenance.


  • Compact, Lightweight, Portable
  • Simple, Easy to use
  • Menu driven touchscreen display
  • Rugged handheld units
  • Accurate testing
  • Expandable, wireless
  • Li-ion Battery operated
  • USB port
  • Interchangeable adapters
  • Save test results, print reports


  • Test installed cables without shorting plugs or long loop-back adapter cables
  • More than continuity – Test for opens, shorts, crossed wires and high resistance connections
  • Verify passive components (resistors, diodes)
  • Cost effective and flexible to meet your needs
  • Save time and save money. Eliminiate hours wasted on hand-beeping and troubleshooting
  • Document test results

How it Works

The DIT-MCO HT-128 is a distributed cable test system that allows you to connect individual testers to each wire harness branch connector rather than relying on a single, centralized tester and multiple return adapter cables. This distributed approach allows you to use small, battery operated testers that wirelessly link together to achieve the desired wire harness test coverage.
ht128 front 740
Using the HT-128 requires minimal training. Simply connect each tester to its corresponding harness connector using snap-in adapters, choose one unit to act as the host, retrieve a previously stored wirelist, link the HT-128s together and begin testing. The HT-128 performs continuity and resistance diagnostics for each wire in the harness. Faults such as opens, shorts, crossed wires or high resistance are reported to the user within seconds. 
ht128 back 740

ht128 diagram3 780

ht128 hand 740

Technical Specifications

Test points 128 (expandable up to 8 units, 1024 points)
Test current 6mA max
Test voltage 3.3V DC
Continuity threshold .5 to 10KΩ ± 2% ± 0.2Ω
Resistor measurements .5 to 10KΩ ± 2% ± 0.2Ω
I.R. threshold 50KΩ to 200KΩ ± 15%
Diode test polarity only
Wireless range

Typically 150' (915Mhz Low Power FSK modulation transceiver for USA)

                       (868Mhz Low Power FSK modulation transceiver for EU)

Battery Rechargeable Li-ion (Typical usage 10-hours between charges. Can be charged via AC adapter or through USB port.)
Operating Temperature Range 0° to 70° C
ht128 side left 740
ht128 side right 740

For cable testing, harness testing and other automated product testing solutions, customers rely on DIT-MCO wiring analyzers.

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