I am sort of a back yard mechanic but this one has stumped me good.My truck is a 2002 Dodge Diesel 2500 4X4 and the windshield wipers quit about a month ago, they wont do anything and I cant figure it out, so far I have;checked the fuse, swapped out the relay, bought a new motor-still didnt work, took it back, bought the wiper switch that goes on the column- still dont work, too that back!!!I am at my wits end, Please Help!!!any questions I will watch and repost if necessary.Thanks
Worn brake pads or low on break fluid
Bad earth connection !!!!!!! Put on a temporary earth wire to check it out !!
you may desire to envision in case you have potential attending to the wiper motor or the electrical powered connection to it. If no potential here, assuming you turn wipers directly to attempt it, hint the wires back to work out if the wires are at fault. you could could desire to track each and all the earlier to the wonderful potential block on the fuse field.
I would check the wiring to see if there is power going to the motor. The wiring may not be providing power to the motor. Check the relay to see if power is going to the wiring (pin 30 and 87). Pin 30 is usually power from the battery and pin 87 is the wire that goes to the accessory for power. Pin 85 and 86 are the wires that trip the relay. Depending on the wiring of the switch, the relay could be negative or positive switched. The next thing would to check the switch to make sure that the relay is being tripped by the switch with someone listening for a clicking sound from the relay. I would also confirm that all the fuses are good cause most manufacturers now double and triple fuse their circuits. There may be a main fuse for the whole car rated at 100-125A in the engine compartment fuse box. The next fuse would be a group fuse at various rating for like the instrument panel lights, radio, and BCM. The third fuse would be for each individual item in the passenger compartment fuse panel. So basically I would verify that all the fuses are good and not blown or missing cause you forgot that you pulled one to replace one that was blown for temporary purposes. Ultimately, the problem sounds to be electrical.
Dale, that vehicle uses a Central Timer Module which controls everything from door locks and dome lamps to the wipers. Ignition on B+ is provided by fuse #6 to the multi-function switch and the wiper motor. When you turn the wipers on at the multi-function switch it sends a mux signal to the Central Timer module which then provides a ground to the wiper motor. If you have access to a mutimeter use the ohm setting to check for a mux signal from the MFS at the brown, violet and white/dark blue wires. Check with the black lead connected to chassis ground. You should see different resistances at each wiper speed setting. If you can see that but you still dont have ground at the wiper motor brown/white (low speed) or red/yellow (high speed) wires then suspect the central timer module. A dealer with a DRB II scan tool can confirm this for you. Hope this helps and best of luck!
