 |  | Frequently Asked Questions | |
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| The display does not illuminate, what can I do? | | 1. Check connection to the battery
2. Battery may be too low to power the tester (below 1 volt). Fully charge the battery and retest.
3. Replace the 9-volt battery and retest |
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| What should I do when there is no power when the print button is pressed? | | | Replace the 9-volt battery. |
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| What should I do when a "System Noise" message appears? | | Verify that all vehicle accessory loads are off and the ignition is in the off position. The tester retests automatically when it no longer detects system noise. If the "System Noise" message continues after several attempts, disconnect the battery cables and retest. If none of the above work, please contact Customer Service.
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