For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 | Did you perform the Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Remote Keyless Entry
2 | With the keyless entry transmitter, attempt to operate the panic function. Do the horns pulse and the headlamps and the park lamps turn on? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3
3 | Do any of the panic functions operate? | Go to Step 4 | Go to Keyless Entry System Inoperative
4 | Do the horns pulse on and off? | Go to Diagnostic System Check - Lighting Systems in Lighting Systems | Go to Diagnostic System Check - Horns in Horns