looking for wiring chart for 1991 GMC Jimmy. Windshield wipers won't work?

Question

The windshield wipers won't work and I have replaced the fuse. The washer fluid won't work nor will the cruise control looking for alternate way to get wipers working.

Answer 1

Full size Jimmy or Mini ??
Turn the key on then turn on your wipers, then open the hood and give a tap on the wiper assembly,preferraby on the black plactic module mounted to it. Did your wipers start to work?
If so replace the wiper delay module on the wiper motor. Its a common failure item.
If not, email me directly and I will email you back with the wiring diagram.

For models equipped with remote pulse module, disconnect pulse control module and connect motor and switch harness electrical connectors together, then recheck system. If problem is corrected, module is defective.

Wiper Inoperative

1. Turn ignition switch On, then check for voltage at motor terminal No. 1, Fig. 1, using a suitable test lamp. If lamp lights, proceed to step 5. If lamp does not light, proceed to step 2.
2. Check condition of fuse. If fuse is satisfactory, repair open in wire between fuse block and wiper motor. If fuse is blown, proceed to step 3.
3. Remove fuse and connect ammeter across fuse block terminals. Operate motor and note current draw. If current draw exceeds capacity of original fuse, proceed to step 4. If current draw is satisfactory, replace fuse and recheck system.
4. Disconnect electrical connector from motor and replace fuse. Cycle wiper switch on and off several times, then recheck fuse. If fuse blows again, check circuit for short or ground and repair as necessary. If fuse is satisfactory, motor is defective.
5. Connect jumper wire between motor terminal No. 2 and ground with ignition switch On. If wiper operates, check ground wire connection at wiper switch. If connection is satisfactory, replace switch. If wiper is still inoperative, motor is defective.

Wiper Operates At Low Speed Only

1. Connect jumper wire between motor terminal No. 3 and ground, Fig. 1, with ignition switch on and electrical connector attached to motor.
2. Move wiper switch to high speed position.
3. If wiper runs at high speed, check wire between terminal No. 3 and switch and repair as necessary. If wire is satisfactory, replace switch.
4. If wiper is inoperative, motor is defective.

Wiper Operates At High Speed Only

1. Connect jumper wire between motor terminal No. 2 and ground, Fig. 1, with ignition switch On and electrical connector attached to motor.
2. Move wiper switch to low speed position.
3. If wiper runs at low speed, check wire between terminal No. 2 and switch and repair as necessary. If wire is satisfactory, replace switch.
4. If wiper is inoperative, motor is defective.

Wiper Operates At One Speed In Both High & Low Switch Positions

1. Disconnect electrical connector from wiper motor and alternately connect battery voltage to motor high and low speed terminals, Fig. 1.
2. If wiper operates correctly in both positions, check continuity of wiring between wiper motor and switch and repair as necessary. If wiring is satisfactory, replace switch.
3. If wiper operates at one speed in both switch positions, motor is defective.

Wiper Blades Stop At Random Position On Windshield

1. Connect jumper wire between motor terminals 4 and 5, Fig. 1, with ignition switch On and electrical connector attached to motor.
2. Move wiper switch to off position.
3. If wiper operates, replace wiper park switch assembly.
4. If wiper is inoperative, check wire between terminal No. 5 and switch and repair as necessary. If wire is satisfactory, replace switch.

Wiper Will Not Shutoff

1. Disconnect wires from wiper motor terminals 4 and 5, Fig. 1, with ignition switch On and wiper switch in off position. If wiper stops operating, motor is defective. If wiper continues to run, proceed to step 2.
2. Disconnect wires from wiper motor terminals 1, 2 and 3 and apply battery voltage to terminal No. 1. If wiper does not operate, check wires between motor terminals 2 and 3 and switch and repair as necessary. If motor continues to operate, motor is defective.

Wiper Operates Intermittently

1. Remove wiper fuse and connect ammeter across fuse block terminals.
2. Turn ignition switch On, then operate wiper at high speed with windshield dry, noting the lowest current draw reading.
3. If current draw is less than 5 amps, motor is defective. If current draw is greater than 5 amps, remove wiper arms and blades, then repeat steps 1 and 2 and proceed to step 4.
4. If current draw is now satisfactory, replace wiper blade elements. If current draw is still high, proceed to step 5.
5. Disconnect wiper linkage from wiper crank arm and repeat steps 1 and 2. If current draw is now satisfactory, check wiper linkage for binding and repair or replace as necessary. If current draw remains high, motor is defective.

Motor Operates But Wiper Blades Do Not

1. Ensure wiper linkage is connected to crank arm.
2. If linkage is connected, a stripped wiper gear is indicated and the motor must be replaced.
3. If linkage is disconnected, reconnect to crank arm and check system.

Answer 2

There is nothing available on line unless you subscribe to an automotive database.
HOWEVER--> you can go to the library and find just exactly what you are looking for. It won't cost anything, and if it is on the computer you can even print it out and take it home.
Or, you can go to the parts house and purchase a repair manual for the little pick up nd then have ALL the information for nearly all the repairs you are likely to attempt. They run < $20.00.

Answer 3

Try autozone.com, they have alot of wiring diagrams and other information on that site.
Sounds like you have a problem with the multifunction switch.