Questions and Answers
Caravan Cruise Control
Q. I have a 1994 Dodge Caravan 3.8 liter auto with a cruise control problem. I have replaced the servo under the hood, checked supply vacuum and used a hand vacuum pump to check for leaks going to the servo. Here's the problem, sometime it works sometimes it don't. I drove the vechicle with a monitor 4000 hooked up all steering wheel switches were operating according to the monitor and it was saying cruise was active but it wasn't.
Brake switch was operating ok also. Where else can I look? Is there a control module? What does it look like and its location? Any help would be appreciated taking trip at the end of the month.
Thanks,
JohnA. There was a TSB, number 21-06-99, issued April 2, 1999 entitled "Speed Sensor - Intermittent Loss of Cruise Control". From the bulletin:
SUBJECT:
Intermittent Loss of Speed ControlOVERVIEW:
MODELS:
This bulletin involves replacing the input and output speed sensor connectors.
1989 - 1995 Spirit/Acclaim/LeBaron Sedan 1989 - 1993 Dynasty/New Yorker/New Yorker Salon 1990 - 1993 Daytona 1990 - 1995 LeBaron Coupe/LeBaron Convertible 1992 - 1994 Shadow/Shadow Convertible/Sundance 1990 - 1991 Chrysler Maserati TC 1989 - 1995 Town & Country/Caravan/Voyager 1990 - 1993 Imperial/New Yorker Fifth Avenue 1993 - 1995 Chrysler Voyager (International Market) 1995 - 1999 Sebring/Avenger/Talon 1996 - 1999 Chrysler Voyager (International Market) 1995 - 1999 Cirrus/Stratus/Breeze 1996 - 1999 Sebring Convertible 1993 - 1997 Concorde/Intrepid/Vision 1993 - 1997 New Yorker/LHS/300M 1996 - 1999 Town & Country/Caravan/Voyager 1997 Prowler NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 41TE/AE BUILT BEFORE AUGUST 8, 1998 (MDH O8O8XX) OR 42LE TRANSAXLE THROUGH THE 1997 MODEL YEAR.
SYMPTOM/CONDITION:
Intermittent loss of speed control condition persists after either the transaxle input speed sensor or output speed sensor has been replaced. The sensor connectors should be checked for spread terminals.DISCUSSION:
The input/output speed sensor supplier changed effective with the 1998 model year for LH vehicles and August 8, 1998 for 41TE/AE equipped vehicles. The terminal layout is slightly different between the old and new sensors. When a new sensor is installed on an early vehicle the connector terminals may be spread from the original sensor and may cause an intermittent speed control condition. Anytime a new sensor is installed on an early vehicle the connector must also be replaced.PARTS REQUIRED:
1 05014469AA Wiring Repair Package, Input Speed Sensor 1 05014471AA Wiring Repair Package, Output Speed Sensor REPAIR PROCEDURE:
- Disconnect and isolate negative battery cable.
- Raise vehicle on a suitable hoist.
- Locate and disconnect the input and/or output sensor connectors.
- If required, detach the harness clip above the input/output sensors and detach the O2 sensor fastener (Christmas tree type fastener).
- Remove the end tape from the input/output harness and push back the convolute tubing.
- Cut the harness just above the top of the connector to remove the input and/or output connector.
- Remove approximately 1/2 inch of insulation from the end of the two wires.
- From the wiring repair package, locate the wiring repair harness. Approximately 1/4 inch of insulation has been removed from the repair harness wires.
- Place a heat shrink tube over each of the two wires on the repair harness.
- Using Miller Crimp Tool # 8272 or equivalent, crimp the splice band to the transmission harness and repair harness wires. Repeat procedure for the second wire.
- Solder the connection together using rosin core type solder.
- Center the heat shrink tube over the splice joint. Heat using a heat gun until the tubing is tightly sealed and sealant comes out of both ends of the tubing.
- Cover wires with attached convolute and add additional convolute from the repair package.
- Tape ends with black electrical tape.
- Route engine harness behind the coolant lines and dipstick tube, away from the exhaust.
- If required connect O2 sensor fastener and attach upper harness clip.
- Connect input/output sensor connectors.
- Connect negative battery cable.
- Verify transmission systems are functioning as designed.
That should fix you up. Have a good trip.
Additional Information provided courtesy of ALLDATA
