Detecting Bad Ground Contacts; Following-Up And Locating Short Circuits - Hazet 2152-5 Notice D'utilisation

Mostly, the reason for a bad ground contact is a loose cable connection, a loose cable in the lug
or an oxidized contact. Such defects can only be detected by a voltage drop. However, the nec-
essary tests are very time-consuming.
With the multifunctional testing device you can detect bad ground contacts without such tests.
Connect the multifunctional testing device to the car battery (see on page 21).
Connect the proof tip to the presumably bad contact. The LED is green (continuity to ground).
• Push the rocker switch forward (+) and watch the LED.
• If the LED changes from GREEN to RED, the ground contact is bad.
• If the circuit breaker is released, the ground contact is fine.

Following-up and locating short circuits

• Start searching for the short circuit in the fuse box.
• Remove the fuse from the fuse box.
• Use the testing device to direct positive current to each of both contacts in the fuse box. At the
side of the short circuit the circuit breaker of the testing device is released.
• Follow the cable through the cable harness as far as possible.
• Pull the cable out of the cable harness and engrave with the proof tip. The LED is green.
• Push the rocker switch forward (+) to find out if you pulled out the appropriate cable (circuit
breaker must release).
• Cut the cable and direct current to each extremity of the cable. The circuit breaker is released
again on the side of the short circuit.
• Repeat this process until the short circuit is located.
3 Design and Function

Detecting bad ground contacts

Do not use on electronic control units!
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