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Jerry, Master Mechanic
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I have a 1995 jeep grand cherokee, has wiper problem. It has

Resolved Question:

I have a 1995 jeep grand cherokee, has wiper problem. It has intermitent wipers thay only work on low and hi and they don't park. I changed out the switch and wiper motor still dosen't work what could be the problem? thanks Bill
Submitted: 4 years ago.
Category: Jeep
Expert:  Jerry replied 4 years ago.

Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.

 

That would only leave the intermitent wiper module. Here is a test for it and the location of it, hope this helps.

 

 

 

graphic

 

The intermittent wiper module is attached to the left cowl side trim panel with a hook and loop fastener patch.

 

 

Testing and Inspection
Notes

Intermittent Wiper/Washer Module

The following tests are to be performed if a problem with wiper system is only evident in the DELAY mode. These tests involve disconnecting the intermittent wiper module, which can be found on a bracket located on the left side kick panel.

Condition: Excessive delay (more than 30 seconds) or in- adequate variation in delay.

  1. Minimum delay (delay control to extreme counterclockwise position before first detent) 1/2 to 2 seconds.
  2. Maximum delay (delay control to extreme clockwise position before off detent) 10 to 30 seconds.
  3. If there is excessive delay or no variations in delay, refer to Multi-Function Switch Diagnosis. Condition: In DELAY mode wipers run continually when washers are operated, but do not provide an extra wipe when the washer control is released.
  1. Replace the intermittent wiper module. CAUTION: When replacing intermittent wiper module, be certain to use the correct replacement module. If an incorrect substitution is used, the wiper delay will be incorrect. Condition: Wipers start erratically during DELAY mode.
  1. Verify that the ground connection at the instrument panel is making good connection (free from paint) and is tight.
  2. Verify that the wiring ground connections are tight and have good contact.
  3. Verify that the wiring ground connections for the intermittent wiper module and the wiper switch are tight.
  4. If condition is not corrected, replace intermittent wiper module. CAUTION: When replacing intermittent wiper module, be certain to use the correct replacement module. If an Incorrect substitution is used, the wiper delay will be incorrect.

 

 

Windshield Wiper Diagnosis

 

 

graphic

 

 

 

  1. Remove circuit breaker from fuse block and turn ignition switch to ACCESSORY or ON.
    1. Measure voltage at the battery side of the circuit breaker cavity. Meter should read battery voltage. If not, repair wiring from ignition switch.
    2. Measure resistance across circuit breaker terminals. Meter should read zero ohms. If not, replace failed circuit breaker.
  1. Unplug wiring harness connector (multi-function switch side) from intermittent wiper module and turn ignition switch to ACCESSORY or ON.
    1. Measure voltage at unplugged connector terminal D, Meter should read battery voltage. If not, repair wiring back to circuit breaker through multi-function switch connector cavity 4. Refer to Multi-Function Switch Diagnosis for additional service information.
    2. Turn wiper switch to LOW. Measure voltage at unplugged connector terminal E. Meter should read battery voltage. If not, repair wiring from wiper switch and/or refer to Multi-Function Switch Diagnosis.
    3. Turn wiper switch to HIGH. Measure voltage at unplugged connector terminal C. Meter should read battery voltage. If not, repair wiring from wiper switch and/or refer to Multi-Function Switch Diagnosis.
  1. With ignition switch OFF and wiring harness connector (multi-function switch side) still unplugged.
    1. Measure resistance between unplugged connector terminals A and G while rotating wiper switch from minimum to maximum DELAY Meter should read from zero to 300K ohms. If not, repair wiring from wiper switch and/or refer to Multi-Function Switch Diagnosis.
    2. Measure resistance between unplugged connector terminals D and G while rotating wiper switch from minimum to maximum DELAY. Meter should read from zero to 300K ohms. If not, repair wiring from wiper switch and/or refer to Multi-Function Switch Diagnosis.
  1. Unplug wiring harness connector (wiper motor side) from intermittent wiper module. Turn wiper switch to LOW or HIGH, then plug both unplugged harness connectors to each other. Turn ignition switch to ACCESSORY or ON. CAUTION: DO NOT move the wiper switch to DELAY with the intermittent wiper module removed from the circuit. If the switch is moved to the DELAY position during the next step, the switch will be damaged.
    1. Test wiper operation in LOW and HIGH speed modes, and test washer operation. If these modes were inoperative, but are OK now, replace failed intermittent wiper module. If not, reinstall intermittent wiper module and go to next step. CAUTION: When replacing intermittent wiper module, be certain to use the correct replacement module. If an incorrect substitution is used, the wiper delay will be incorrect.
  1. Turn ignition switch to ACCESSORY or ON, and turn wiper switch to LOW or HIGH. Measure voltage at either intermittent wiper module connector terminal F and move wiper switch to OFF. Meter should show battery voltage until wipers park, and then zero volts. If OK, go to step 6. If not, check wiring to wiper motor and perform Multi-Function Switch Diagnosis, then go to step 6.
  2. To test the wiper motor, turn the ignition switch to ACCESSORY or ON. Position the wiper switch and probe the motor connector as indicated in the following steps.
    1. Wiper switch in OFF position, measure resistance between terminal 4 and a good ground. Meter should read zero ohms. If not, repair wiring to ground.
    2. Wiper switch in any position, measure voltage at terminal 1. Meter should read battery voltage. If not, repair wiring to intermittent wiper module.
    3. Wiper switch in LOW, measure voltage at terminal 5. Meter should read battery voltage. If OK, but if wipers do not operate, replace failed wiper motor. If not, repair wiring to intermittent wiper module.
    4. Wiper switch in HIGH, measure voltage at terminal 6. Meter should read battery voltage. If OK, but wipers do not operate, replace failed wiper motor. If not, repair wiring to intermittent wiper module.
    5. Wiper switch in LOW or HIGH, voltmeter connected to terminal 2. Turn wiper switch to OFF and observe meter. Meter should read battery voltage when switch goes to OFF, then zero volts after wipers park. If battery voltage present, but wipers fail to park, replace failed wiper motor. If no battery voltage present, repair wiring to intermittent wiper module.

 

 

 

Jerry, Master Mechanic
Category: Jeep
Satisfied Customers: 13001
Experience: ASE Master...30+ years...Shop owner..engine builder..collision structural repair
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