Power Source: Nao Or Universal Power Supply; Cigarette Lighter Power Cable 3-Amp Fuse Replacement - GMC Tech2 User Manual

Power Source: NAO or Universal Power Supply

Step
1 1. Unplug NAO (or Universal)
power supply jack from DLC
cable.
2. Using a digital multi-meter
(DMM), verify voltage output at
power jack.
Do you have battery voltage
output?
2 1. Remove DLC cable from
Tech2.
2. Plug in NAO (or Universal)
power supply power jack to the
VCI power jack connector
located at bottom of Tech2.
Does the Tech2 power on?
Troubleshooting table for NAO or universal power supply "No Power"

Cigarette Lighter Power Cable 3-Amp Fuse Replacement

A three-amp removable fuse is located in the cigarette lighter power cable (P/N 3000096)
connector. When required, check or replace the fuse by performing the following steps:
1. Ensure cigarette lighter power cable is not connected to vehicle or Tech2.
2. Unscrew fuse retainer cap and remove three-amp fuse.
3. Inspect fuse for damage and replace with identical three-amp fuse if required.
4. Verify by connecting cigarette lighter power cable to Tech2 and vehicle.
Action
General Motors Tech2 User Guide
Yes
Go to Step 2 Replace NAO or
Universal power
supply.
Replace DLC Problem with Tech2.
cable. Contact Customer
Support.
No
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