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If upon turning the switch, you hear either a buzzing or a noise coming from the wiper area but no movement of the windshield wipers, then it becomes likely that there is a mechanical problem. In front wiper systems, there are two moving parts, the wiper motor and the wiper transmission. In rear wiper systems with a single wiper, there’s a single moving part, the wiper motor.
If you hear a buzz, it could be a motor straining to move a jammed wiper transmission or a locked motor gear. If you hear a grind coming from the wiper area, it could be a stripped gear in either the motor, the transmission or where the wiper arm splines to the wiper motor in the rear. Don’t let the term transmission fill you with dread; it’s simply a term for a multi-lever set of arms and hinges that turn the circular motion of the wiper motor into the side to side motion of the wiper arms. It is also possible that the spline on the post of the front wiper arms is stripped.
Generally speaking, you can reach the motor and transmission by removing the wiper arms, all the screws that hold the cowl beneath the wiper arms and the weather stripping. Once exposed, you should be able to remove the motor from the transmission and check to see if the transmission is binding or if the motor is the culprit. Simply, replace the culprit, and reassemble.
If the problem is with the rear wiper system, getting to the wiper motor can be more difficult with far more trim to remove than with a front system. You may elect to consult your mechanic for help.
Could be a lot of things but lets check the obvious first, check your fuses, and then check for power at the wiper motor, if power there than it could be a bad motor. If you don't have power start at your switch and work your way back to the motor.
check rear wiper fuse and relay.if wiper motor getting power but do not work.rear wiper motor bad.if fuse and relay okay but no power going to rear wiper rear wiper switch could be bad.
The procedure for re-setting the HVAC control panel on a 1998 Dodge Grand Caravan follows: With ignition on but not running 1. turn knob to air vents 2. turn fan knob to ON 3. temperature setting on COLD (2X) {I have dual temp controls} 4. hold top(rear wiper) and bottom (rear wiper with wash) buttons pressing down together until all the buttons cycle through (this will require 1 to 2 minutes of continuous pressing) Hopefully, this also applies to 1997 version. I learned this from a very helpful local Dodge service adviser
First check that the nut on the arm is secute,and that the motor is running ,also check the fues ,if you cannot heare the moter and the fues is ok change the moter
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