1. Gather the necessary parts. You will need a cruise control module, a cruise control switch, a vacuum booster, a vacuum hose, and various mounting brackets and hardware.
2. Install the cruise control module. The cruise control module is typically mounted under the hood, near the brake booster.
3. Install the cruise control switch. The cruise control switch is typically mounted on the steering wheel or on a stalk near the turn signal lever.
4. Install the vacuum booster. The vacuum booster is typically mounted on the firewall, near the brake master cylinder.
5. Connect the vacuum hose. The vacuum hose connects the vacuum booster to the intake manifold.
6. Connect the electrical wiring. The cruise control module needs to be connected to the power supply, the ground, the brake light switch, and the speed sensor.
7. Test the cruise control. Once everything is installed, you can test the cruise control by driving the vehicle and engaging the cruise control switch.
It is important to note that adding cruise control to a 1998 Chevy Prism may require some modifications to the vehicle's wiring and vacuum lines. If you are not comfortable with this type of work, it is best to consult with a qualified mechanic.
