Please note that these ideas and procedures are for someone who has the time, inclination and technical ability to understand and follow them. There are other alternatives. We can generally tell you, over the phone or by email, what is wrong with your system if you let us know what the symptoms are. Or, naturally, you can have your favorite local qualified mechanic perform the work. Please do not hesitate to email or call us if you have questions or concerns.
These tests are performed with the ignition switch on and are measured at the Amplifier.
| Pin 1 | BV | (BV = battery voltage: somewhere between 12.5 and 13.8 Vdc) |
| Pin 2 | Decel/Set | 0 Vdc initially - goes to BV for Decel/Set |
| Pin 3 | On/Off | BV initially - goes to 0 V for Off |
| Pin 4 | Accel/Set | 0 Vdc initially - goes to BV for Accel/Set |
| Pin 6 | Resume | 0 Vdc initially - goes to BV for Resume |
| Pin 8 | Brake Disengage | MUST BE 0 Vdc for Cruise System to work - goes to BV when you step on the brake. |
The system gets a critical ground through the brake light bulb filaments. If both bulbs are burned out or there is not proper ground here the system will not work. This is the mechanism for canceling the Cruise when you step on the brake: this pin goes from ground to plus voltage and loses a ground which is necessary for the stem to stay engaged.
| Pin 12 | Ground |
| Pin 14 | Ground (some cars have no ground here; the system will work without it) |
This test must be performed with the rear wheels turning. Please have two qualified people present at all times.
| Pin 11 | Speed Sensor | loaded (with the amplifier plugged in) must be at least 2.0 Vrms at 25 mph. |
The amplifier actually measures the frequency of this signal. At 60 mph the frequency should be 131 Hz.