Need a little help here on an issue that is driving me crazy. Have a 2002 Caravan and the cruise will not work. When I turn on the cruise the light iluminates for a split second then goes off.

Any one ever experience this problem or have an ideas?

Here is what I have done so far.

Changed servo with know working unit

changed brake switch

checked all vaccum lines

Checked all the wiring harness as I have a code 1595 (Speed control vacuum or vent solenoid control circuits shorted or lost)

relay swapped

I do not think it is the clock spring as everything else is working but will try swapping clock springs with a used one I have that is in working condition.

Anyone with any thoughts? All are apreciated.

 

Welcome to DF
Symptom List:
P1595-SPEED CONTROL SOLENOID CIRCUITS
P1683-SPD CTRL PWR RELAY; OR S/C 12V DRIVER CKT
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P1595-SPEED CONTROL SOLENOID
CIRCUITS.
When Monitored and Set Condition:
P1595-SPEED CONTROL SOLENOID CIRCUITS
When Monitored: With the ignition on. Battery voltage greater than 10 volts. Speed
Control Switched on.
Set Condition: The Powertrain Control Module actuates the vacuum and vent solenoids
but they do not respond.
P1683-SPD CTRL PWR RELAY; OR S/C 12V DRIVER CKT
When Monitored: With the ignition key on. The speed control switched on.
Set Condition: The speed control power supply circuit is either open or shorted to ground.
POSSIBLE CAUSES
GROUND CIRCUIT OPEN
INTERMITTENT CONDITION
S/C BRAKE SWITCH OUTPUT CIRCUIT
SPEED CONTROL SWITCH OUTPUT OPEN
BRAKE LAMP SWITCH
SPEED CONTROL POWER SUPPLY CIRCUIT
PCM (S/C POWER SUPPLY)
SPEED CONTROL VACUUM SOLENOID
SPEED CONTROL VACUUM SOLENOID CONTROL CIRCUIT OPEN
PCM (VACUUM SOLENOID)
SPEED CONTROL VACUUM SOLENOID CONTROL CIRCUIT SHORTED TO GROUND
SPEED CONTROL VENT SOLENOID
SPEED CONTROL VENT SOLENOID CONTROL CIRCUIT OPEN
SPEED CONTROL VENT SOLENOID CONTROL CIRCUIT SHORTED TO GROUND
PCM (VENT SOLENOID)
296
SPEED CONTROL

 

UPDATE: Well it is not the clockspring but I knew it wasn't. Cleaned every connection in the vehicle and in the engine compartment. Only thing left is a short or break in the wiring harness, the PCM, or control switches on the wheel.

One thing I never noticed before. When I have the brake pedal pressed and activate the cruise control, the light stays on and I can switch it on and off. Once I release the pedal the system fails and will not reactivate unless the key is turned off and then back on.

This thing is driving me nuts.

 

I went through a long drawn out affair this spring with our 2001. I did most of the things you did including the brake switch, servo, left hand switch on the column and finally, the ECM. Each time I tried something, I had myself convinced that that particular part was the problem. In my case, the light was always on and nothing I tried would make it go off but the system never worked either.
This was undoubtedly not related but it started working after I changed the fluid and filter in the transmission.
Go figure.

 

Cruise Control is your right foot man.
sheesh the more gizmos the more headaches lol

 

Ya, the only problem is the foot gets tired and I start doing 60 in a 40 and not even notice, LOL. Especially after work, LOL

 

changed the filter and fluid???? i have the same problem but that dose not make any scene to me ether.

 

Sir, have you fixed your problem.
I have exact symptoms as you.
I replaced Brake Switch but no success.
The old switch was good.
I’m thinking replacing the switch harness.

 

I have sane symptoms same engine code. Same problems.