'94 K5 Blazer Cruise Control inoperative
#1
11-17-2010, 07:02 PM
'94 K5 Blazer Cruise Control inoperative
Help needed. 94 K5 Blazer's cruise control is not engaging. I replaced the Module and wiring connector today, as the bottom 2 pins were corroded and rusty and I could only assume faulty as well. The replacements came off of a '94 Suburban so should be an exact match there. Still did not resolve the issue.
Does this model cruise have any association to the ECM? Other than a brakelight switch, I'm at a loss as to the nature of how this could occur.
Here's a picture of the connector I replaced.
Pins 3, 7, and 8 starting from top left to right have power whether the switch is on or off using a test light. Did not get any other pins to light up when the set or resume button is pushed.
Any help anyone could give is appreciated.
Does this model cruise have any association to the ECM? Other than a brakelight switch, I'm at a loss as to the nature of how this could occur.
Here's a picture of the connector I replaced.
Pins 3, 7, and 8 starting from top left to right have power whether the switch is on or off using a test light. Did not get any other pins to light up when the set or resume button is pushed.
Any help anyone could give is appreciated.
#2
11-18-2010, 10:03 AM
Update: I took a multi meter and went through to check voltages on the pins. 3, 7, and 8 are pushing 14 VAC constant current. Pin 4 I found is the set button and when the switch is on and pushed, it also puts out 14 VAC. When the switch is in the off position and the button is pushed it does not push any current through so I can only assume the switch is good and working.
No other pins are allowing current through.
Didn't know if this information would help, but I wanted to let you know what else I did on this. Thoughts?
No other pins are allowing current through.
Didn't know if this information would help, but I wanted to let you know what else I did on this. Thoughts?
#3
11-18-2010, 11:39 AM
Maybe this will help (see quote below & attached diagram):
K5 = solid front axle just FYI!
Cruise Control Does Not Engage
Cruise Control Does Not Disengage Using Brake Or Clutch Pedal
- Ensure GAGES fuse is okay. Turn ignition switch to RUN position. Turn on cruise control. Check for battery voltage at Pink/Black wire terminal of cruise control switch connector and cruise control module connector.
- If battery voltage is not present, repair open in Pink/Black wire. If battery voltage is present, check for battery voltage at Gray wire terminal of cruise control switch connector. If battery voltage is not present, replace cruise control switch.
- 3.If battery voltage is present, check for battery voltage at Gray wire terminal of cruise control module connector. If battery voltage is not present, repair open in Gray wire. If battery voltage is present, check for battery voltage between Gray and Black/White wire terminals of cruise control module connector.
- If battery voltage is not present, repair open in Black/White wire. If battery voltage is present, check for battery voltage at Gray wire terminal of brake release switch connector. If battery voltage is not present, repair open in Gray wire. If battery voltage is present, check for battery voltage at Brown wire terminal of brake release switch connector while depressing brake pedal.
- If battery voltage is present on vehicles with automatic transmission, go to step 7). If battery voltage is present on vehicles with manual transmission, go to next step. If battery voltage is not present, adjust brake release switch. See BRAKE & CLUTCH RELEASE SWITCHES under ADJUSTMENTS. Replace brake release switch if it cannot be adjusted.
- Check for battery voltage at Brown wire terminal of clutch release switch connector while depressing brake pedal. If battery voltage is present, go to next step. If battery voltage is not present, adjust clutch release switch. See BRAKE & CLUTCH RELEASE SWITCHES under ADJUSTMENTS. Replace clutch release switch if it cannot be adjusted.
- Check for battery voltage at Brown wire terminal of cruise control module connector while depressing brake pedal. If battery voltage is present, replace cruise control module. If battery voltage is not present, repair open in Brown wire.
Cruise Control Does Not Disengage Using Brake Or Clutch Pedal
- Ensure GAGES fuse is okay. Turn ignition switch to RUN position. Turn on cruise control. While depressing brake pedal, check for battery voltage at Brown wire terminal of brake release switch connector.
- If battery voltage is not present, replace cruise control module. If battery voltage is present, adjust brake release switch. See BRAKE & CLUTCH RELEASE SWITCHES under ADJUSTMENTS. Replace brake release switch if it cannot be adjusted. On vehicles with manual transmission, go to next step.
- While depressing clutch pedal, check for battery voltage at Brown wire terminal of clutch release switch connector. If battery voltage is not present, replace cruise control module. If battery voltage is present, adjust clutch release switch. See BRAKE & CLUTCH RELEASE SWITCHES under ADJUSTMENTS. Replace clutch release switch if it cannot be adjusted.
#4
11-18-2010, 01:08 PM
Swart,
Thanks. It appears that the switch itsellf is bad. The only other question I have, is does the steering column have to be broken down to replace the lever assy.? I can see it move, but don't see how it's connected on the 3 -way swivel.
Thanks. It appears that the switch itsellf is bad. The only other question I have, is does the steering column have to be broken down to replace the lever assy.? I can see it move, but don't see how it's connected on the 3 -way swivel.
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