Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCADILLAC1991FLEETWOOD FWD V8-300 4.9LREPAIR AND DIAGNOSISCRUISE CONTROLCRUISE CONTROL MODULEDESCRIPTION AND OPERATION
1991 Cadillac Fleetwood FWD V8-300 4.9L
Cruise Control Module: Description and Operation
1991 Cadillac Fleetwood FWD V8-300 4.9LSECTION Description and Operation
The ECM or PCM receives input signals from the cruise control engagement switches, instrument panel switch, brake release switch, drive switch and speed sensor.
On models equipped with DFI or PFI, the ECM or PCM also receives engine control signals. The ECM then processes these signals and transmits a command signal to the solenoid valve, regulating vacuum to the servo unit diaphragm.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.