Circuit/System Testing

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 Isuzu i-290, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.

Operate the panic function. The horns should pulse and the daytime running lamps should flash on and off.
- If none of the panic functions operate, refer to Keyless Entry System Inoperative .
Verify that the headlamps pulse ON and OFF when the panic button is pressed.
- If they do not pulse ON and OFF, refer to Diagnostic Starting Point - Lighting Systems .
Refer to Diagnostic Starting Point - Horns .