Occasionally, and it seems after a rain, the cruise control and radio on my `03 Alero stop working. The radio turns on but there is no sound. After a day or so they start working again. Yesterday I spent about 30 minutes driving in a very heavy rain. Several hours after the rain stopped I left a store and after starting the car, I turned on the AC to cool my dog. It didn't work. Although the indicator light was on, the compressor apparently wasn't engaged. Then I saw that all dash gauges had stopped working. This condition continued during my 30 minute drive home. Three hours after getting home I started the car and everything worked. It seem that some connector is getting wet, but where is it?
I gave my 2001 alero to my brother for x-mas....all of a sudden alot of the things that were electric which is everything in this car,just stopped working!! windshield wipers, radio, the all dash lights came on and then off...then all of a sudden he couldnt start the car..it was like it was DEAD!! your going to need a new computer system for the car... his as well leaked water on the passenger side and sometimes on driver side.. car washes arent the main problem, it is that oldsmobile needs to make the seals better on these cars!! other than that, aleros are great cars! especially when there loaded:) his computer system cost him around $600 at chevy! maybe people with this problem can look and see if theres a recall on any seals etc... hope this helps everyone out!
I had this problem with mine. Do not ever use a automated car wash on your ALERO----it destroys the seal around the window. Then, when you drive in rain, water leaks into the fuse box, shorting it out. I had to replace the fuse box ($500). Hope this helps.
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It's probably a problem with cruise control module , located under the hood in engine compartment . Or a bad connection somewhere . Do you know how to do electrical testing ? Is the air bag light lit on the instrument cluster ?
Could have DTC'S - diagnostic trouble code's stored .
The powertrain control module (PCM) inhibits cruise control operation when certain conditions are not appropriate for cruise control operation. The PCM removes the ground from the cruise control inhibit signal circuit in order to disengage cruise control operation.
Output driver modules (ODMs) are used by the powertrain control module (PCM) in order to turn on many of the current driven devices that are needed to control various engine and transaxle functions. DTC P1558 set indicates that an improper voltage level has been detected on the signal circuit which controls the cruise control inhibit circuit.
Action Taken When the DTC Sets
• The PCM will not illuminate the malfunction indicator lamp (MIL).
• The PCM will store the conditions present when the DTC set as Failure Records data only.
Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions. However, steep grades may cause variations in the selected speeds. The electronic cruise control system has the capability to CRUISE, COAST, RESUME SPEED, ACCELERATE, and TAP-UP or TAP-DOWN.
The main parts of the cruise control system are:
• The cruise control module assembly
• The function control switches
• The cruise control release switch
• The clutch pedal position switch (CPP), if equipped
• The stop lamp switch assembly
• The vehicle speed sensor
The cruise control system uses the cruise control module assembly to maintain the desired vehicle cruise speed and operation. The cruise control module assembly has an electronic controller and an electric stepper motor to vary the throttle in each different cruise control mode. The electric controller monitors vehicle speed and operates the electric stepper motor. The stepper motor operates in response to the electronic controller, to maintain the desired cruise speed. The electric stepper motor moves a strap that is attached to the cruise control cable which moves the throttle linkage. The cruise control module assembly contains a low speed limit which will prevent system engagement below a minimum speed of 40 km/h (25 mph). The module assembly is not serviceable.
This may seem odd but try it. Look at the neck of your brake pedal. Towards the top you will see the brake light switch. Usually right next to it with a similar mechanism is the cruise control cut off switch. Also controlled by the motion of the brake pedal. There should be some sort of plastic bumper between the switch and the brake pedal arm. See if it is worn, cracked or missing. Replace & readjust if it is damaged. It's a dealer item at the parts counter. If they keep them on hand in stock then you know it's a common problem. This may fix your problem.
May have to check out if the vacuum motors have the vacuum tubes attached but this may take a lot of work to disassemble the heating ventilation air conditioning out of the dash and underneath the dashboard. If rain enters the compartment under the dashboard, the pan that is designed to catch water may be disturbed or cracked somehow. Try to check fuses for a/c and the heating, the cruise control, and windshield wipers to see if there is an obvious electrical issue there. The vacuum leak is not related to the windshield wiper motor not working.
There are a few things you can try. First, check your
brake lights, if they do not work the problem may be
in the stoplight sw circuit. Also there are 3 fuses you
can check, 1 is a 25amp in the fuse block under the
hood the next 2 are in the fuse block under the dash.
One is the 15amp stoplight fuse and the other is a
10amp turn sig fuse. These fuses are either directly
or indirectly related to the cruise ctrl. Next check the
cruise switchs accel/coast set/resume if either sw.
was sticking in any posistion for 90 seconds or more,
the cruise ctrl. will shut down. There are trouble codes that will set but they won't trip the check engine light. You'll need an obdII scanner to recover
them from the memory. If you don't have one, go to
autozone/napa or advance auto parts they will scan it
free. The codes of interest are po571 stoplight switch
po567 and po568 the cruise ctrl switch's. And any
other codes related to the torque converter clutch -
the speed sensor - throttle actuator control.
Hope this helps. Good luck.
use a scanner to check the abs system . most of the time the abs brakes and traction control system work together. your cruise control . unit has a servo motor .in front right fender well. check the fuse and relay also the cruise control brake release switch. and the brake light switch.if all is good you have a cruise control module problems. dealer ship job.
if it worked before i would chk. the fuse, there will be one for it, but if its blowen something made it do it. i would replace it, and if it blows again, you will have to find the cause, could be switch.