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  #1  
Old 08-15-2018, 10:21 AM
lpllallstars lpllallstars is offline
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Default Cruise Control Not working, Speed Control Light blinking

Alright lads,

a few weeks ago I replaced my cruise control switches because the blistering heat here in FL tears them to shreds. I installed them all fine and got everything hooked up, but when I went for a test drive, the Speed Control light was blinking every 5 seconds or so. I read that replacing the Brake Pressure Switch could solve it, so I bought a new one and replaced it, but I still have the same problem. I've triple checked the connections to the switches. One thing I did notice is that only the left switch illuminates when the lights are on, not the right switch. Any ideas? Maybe just a faulty switch?

Thanks.
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Old 08-15-2018, 10:59 AM
djfllmn djfllmn is offline
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Default Re: Cruise Control Not working, Speed Control Light blinking

there is a self test you can run on the system and the light blinks a code at you..let me try to find it

----------

found it!

Quote:
Originally Posted by Blhde View Post
Self-Test Diagnostics

WARNING:
This test is a key on engine off (KOEO) test that is only conducted in park with emergency brake fully engaged.

l Enter self-test diagnostics by depressing the speed control OFF switch while turning the ignition key on, making sure the engine does not start and is not running. The speed control indicator lamp on the instrument panel will flash once to indicate that the speed control module entered the diagnostic mode. Five additional flashes at this point indicate a defective speed control servo. Release the OFF switch.

l Note:
If the ON switch is not pressed within five seconds after entering diagnostic mode, the module times out and the procedure must be started over.

Press the remaining switches in this sequence: ON, RSM (resume), CST (coast) and SET/ACCEL.

l The speed control indicator lamp will flash as each switch is pressed. Press each switch in the sequence immediately after the light goes out for the previous switch.

l Note:
There will be a slight delay when the last button is pressed and the lamp flashes.

A lamp flash with the last button (SET/ACCEL) indicates that the STATIC test passed. If the lamp does not flash with the last button and there are no additional flashes of the lamp, the switch is defective. If the lamp does not flash with the last button, and the additional flashes occur, follow the list below for trouble codes:

— 2 flashes: Brake pedal position (BPP) switch is defective, circuit is defective, or brake pedal is applied; clutch pedal position (CPP) switch is defective, circuit is defective, or clutch pedal is applied.

— 3 flashes: Brake deactivation switch is open or circuit is defective.

— 4 flashes: Vehicle speed signal is out of range or circuit is defective.

l 0.25 seconds after the static test has passed, the speed control servo will carry out a dynamic test automatically by actuating the throttle lever from 1 to 10 mm (.04 to.39 inch) of travel from the idle position. During the dynamic throttle pull, observe throttle movement to witness any binding or sticking of the speed control cable, verify the correct connection of the speed control cable to the throttle lever, and make sure the throttle returns back to the idle position. If incorrect connection or binding or sticking of the speed control is observed, go to the Symptom Chart. If no dynamic pull occurs at the throttle body go to Pinpoint Test F.

l Return the ignition switch to the OFF position and proceed to the Symptom Chart.
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  #3  
Old 08-15-2018, 11:10 AM
CalebJ CalebJ is offline
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Default Re: Cruise Control Not working, Speed Control Light blinking

Did the old switches function? If so, you can just plug them back in to at quickly confirm if the issue is in the new equipment you installed.
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Old 08-15-2018, 11:57 AM
lpllallstars lpllallstars is offline
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Default Re: Cruise Control Not working, Speed Control Light blinking

Quote:
Originally Posted by djfllmn View Post
there is a self test you can run on the system and the light blinks a code at you..let me try to find it

----------

found it!


​​​​​​​
I performed the test several times and nothing happens. As for plugging in the old switches, that would be a great idea if I still had them haha. I'm assuming that since the test isn't working, it is probably the switch.
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