Can I use the 3420 Smart Test Light to test PCM/ECU or modules?
The Smart Test Light is not designed to be used on computer circuitry. Consult the vehicle's service manual for procedures and specifications before using the Smart Test Light tester on any vehicle.

What is the warranty period?
The Manufacturer warrants to the original purchaser that this unit is free of defects in materials and workmanship under normal use and maintenance for a period of one (1) year from the date of original purchase. If the unit fails within the one (1) year period, it will be repaired or replaced at the manufacturer's discretion.

Can I use the 3420 Smart Test Light on systems higher than 12V DC?
The 3420 is designed for 12V DC systems only. Do NOT use on ANY AC volt system.

Where can I get the owner's manual for it?
Click on the Support tab at the top of our website or visit www.innova.com/support. Select Electrical Testers as the product category, then select your part number. Click Search to begin accessing the owner's manual.

Can I use the 3420 Smart Test Light to test the SRS system (Airbags)?
NEVER use this tool to diagnose automotive airbag/safety restraint systems (SRS). Consult the vehicle's service manual for procedures and specifications before using the Digital Test Light tester on any vehicle.