Wireing diagram for front wiper motor - 1989 Jeep Cherokee

I'd have to pull a wiring diagram to say for sure, but it appears both the front and back wiper motors are part of the same "series" circuit, so if you disconnect one, the other will not work.

Plug the front motor back up really quick. If the rear wiper motor works, you've found the problem. Is there a particular reason why you disconnected the rear motor?

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Just replacing parts isn't the way to fix this problem , viewing wiring diagrams too see what all is involved in making the wipers work is . Then using a digital volt ohmmeter to test electrical circuits . Also looking at factory service info. to see how it's suppose to work.
Free wiring diagrams here http://www.bbbind.com/free-tsb/ Enter vehicle info. year , make , model an engine size . Under system click on body & accessories , then under subsystem click on wiper/washer . Click the search button ,then click the blue link. Looking at the wiring diagram i see two fuse's an two relays that are controlled by the BCM - body control module . Also hooking up a scan tool that can read BCM DTC'S - diagnostic trouble codes could be helpful . The wiper switch is a input to the BCM - the BCM will energize the relays to turn on the wipers.

Wiper/Washer System Components
The Wiper/Washer System consists of the following components:
• Windshield wiper/washer switch
• Body control module (BCM)
• Wiper 1 relay
• Wiper 2 relay
• Wiper diode
• Windshield wiper motor
• Windshield washer pump
• Windshield washer nozzles
• Windshield washer solvent container
• Windshield wiper arm and blade assemblies
• Windshield wiper transmission
• WIPER/SW 10A fuse
• WIPER 25A fuse

Wiper/Washer System Description
The body control module (BCM) controls wiper motor low speed operation. The washer pump and high speed operation are controlled directly by the wiper/washer switch. The windshield wiper/washer switch supplies voltage on the signal circuits to the BCM for windshield wiper/washer operation. When WASH, MIST, DELAY, LOW, or HIGH is detected, the BCM energizes the wiper 1 relay by suppling voltage to the relay coil. This allows battery voltage from the WIPER fuse to flow through the relay switched input then through the contacts and out the relay contacts to the wiper 2 relay switch contacts. Since the wiper 2 relay switch contacts are normally closed to the low speed circuit of the windshield wiper motor, the motor will operate at low speed.

DTC B3715 02: Front Wiper Relay Drive Circuit Short to Ground
DTC B3715 05: Front Wiper Relay Drive Circuit Short to Battery or Open

I would bet that the 30 amp fuse feeds the motor and the 10 amp fuse feeds both of the switches. Can you remove the rear trim to gain access to the rear motor and unplug it?

Free wiring diagrams here http://www.bbbind.com/free-tsb
Enter vehicle info. Year , make , model an engine . Under system click on body & accessories , then under subsystem click on wipers/washers . Click the search button then the first blue link . The first link is front wipers . Could be a connection problem or electronics inside the wiper motor . Check for corrosion loose ground wire . G103 & G104 these are under the hood in the engine bay . Do you know how to test using a DVOM -digital volt ohm meter ? Voltage drop testing ?
Electric Testing Techniques You Need to Know

Wiper relays (2) on/off relay an speed relay , location battery junction box . Look at the wiring diagram here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine . System click body & accessories , subsystem click wipers/washers . Click the search button , then the blue link . After viewing the wiring diagram for the wipers , Change systems to electrical distribution , then click junction block . Then the search button an first blue link . Shows the relay position . The wiper switch is a input to the front electronic control module . The relays are also controlled by the electronic control module . Probably has code set in the module . You would need a factory scan tool to check this .

The front wipers are controlled by the TIPM - totally integrated power module (electronic module ) ! Check power an ground at the wiper motor connector . Four wires , Black is ground , brown / white is low speed , brown/lite blue is high speed ,brown / orange is park switch sense . Can you do this ? Go to http://bbbind.com/free_tsb.html free wiring diagrams ! Videos on you tube on basic automotive electrical testing , how to read a wiring diagram , how to use a DVOM etc... That is if you don't already know how to . Defective TIPM Is Causing Dangerous Power Problems in Chrysler Vehicles Then again after you read this you may want to take it to the dealer !

Go to www.hmaservice.com and register( Vehicle by VIN). Afterward, you have access to shop manuals, service bulletins, wiring diagrams, etc. about your vehicle.

If the same as on a 93 the wiper motor has two connectors.

Connector A (motor):

wiper switch to motor (high) - dark brown / orange
wiper switch to motor (low) - white
ground - black

Connector B (park switch):

wiper switch to motor (park and return) - red
wiper switch to motor (park return) - black
ground - black

Hope this helps.

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