I wonder if a cruise control expert could give advise for my 92 automatic. The last time I saw the cruise control work was just before the speedometer quick working - the speedo became erratic, jumping up and down. The cruise would work so long as the speedo work, but when the speedo went to 0 MPH, the cruise control released. Whenever the speedo would reume working, the cruise control would again work. I fixed the speedo problem by replacing the speed sensor. But now the cruise control won't work at all.
In an effort to find the problem, I have proven the following: voltages present at the steering wheel on/off (12 V) and resume/set/accel buttons (less than 12 V. but responding to switch movement), voltages at the cable leading to the servo under the driver's side fender well, significant vacumm to the servo with engine running, proven that the vacumm "dumps" whenever the brake pedal is pressed, inspected the wiring connections inside the servo for broken or corrosion, proven that the vacumm line to the reservoir is not leaking.
I have no errors on the diagnostic code testing scanner.
Can anyone advise what else to try?
In an effort to find the problem, I have proven the following: voltages present at the steering wheel on/off (12 V) and resume/set/accel buttons (less than 12 V. but responding to switch movement), voltages at the cable leading to the servo under the driver's side fender well, significant vacumm to the servo with engine running, proven that the vacumm "dumps" whenever the brake pedal is pressed, inspected the wiring connections inside the servo for broken or corrosion, proven that the vacumm line to the reservoir is not leaking.
I have no errors on the diagnostic code testing scanner.
Can anyone advise what else to try?