Dodge D100 Wiper Motor: Your Guide to a Clear Windshield (1981-1989)
Don't let a faulty wiper motor leave you blind in a storm; here’s how to diagnose and replace it on your classic Dodge truck.
- First, check for broken plastic wiper linkage bushings; this is a very common failure on D100s and is a much cheaper fix than a new motor.
- A bad motor will cause slow operation, loss of one speed, or failure to park correctly.
- There are no active safety recalls for the wiper motor on the 1981-1989 Dodge D100; failures are due to age.
- When installing a new motor, let it run and turn it off to find the 'park' position before attaching the linkage arms to ensure proper alignment.
Is It Really Your Wiper Motor? First, Check This Common Issue.
Before you spend money on a new motor, you need to check one of the most common failure points on these 1980s Dodge trucks: the wiper linkage bushings. These are small plastic or nylon inserts that connect the motor's arm to the linkage that moves the wipers. Over decades, these bushings become brittle and crumble, causing the linkage to pop off the motor.
Symptoms of a Failing Wiper Motor
If you've ruled out the bushings, your motor is likely the culprit. Here are the classic signs of a bad wiper motor on a D100:
- Slow or Stuttering Wipers: The wipers move much slower than they used to, even on the high-speed setting.
- Wipers Only Work on One Speed: You might lose the low-speed function and only have high-speed available, or vice-versa. This points to a problem with the motor's internal electrical components.
- Wipers Won't Park Correctly: When you turn the wipers off, they stop in the middle of the windshield instead of returning to their resting position at the bottom. This is a classic sign of a failed park switch inside the motor.
- No Movement, No Sound: You turn the switch and nothing happens at all. Always check the fuse first, but if the fuse is good, the motor has likely burned out completely.
Choosing the Right Aftermarket Wiper Motor
Since new OEM Mopar motors for this truck are long discontinued, the aftermarket is your only real source for a new part. Here’s a breakdown of the common brands available.
Tier 1: New & Remanufactured (Cardone)
Cardone is a well-known aftermarket company that offers both new parts (under the 'Cardone Select' line) and remanufactured original units. Their remanufactured motors are often rebuilt with improvements to address original failure points. They are generally considered a reliable choice with good quality control.
Tier 2: Standard Replacement (WAI Global)
WAI Global specializes in automotive electrical parts like alternators and starters, and also produces wiper motors. They are a common mid-range option. While they produce quality components, some user reviews are mixed, and there is speculation in forums that some aftermarket brands may source their parts from the same factories.
Tier 3: Economy (Replacement)
The 'Replacement' brand is a private-label option that offers a functional part at the lowest price point. These motors are built to meet basic requirements and are a good choice for a budget-conscious repair, but may not have the same longevity or robust testing as more established brands.
Cost at a Glance
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $60 - $172 |
| Remanufactured Aftermarket | $70 - $120 |
| Used OEM (Junkyard/eBay) | $40 - $100 (Varies) |
| Shop Labor | $100 - $225 |
Known Issues, Recalls, and TSBs
While Chrysler and Dodge have issued safety recalls for wiper motors on other trucks (NHTSA campaign 06V067000, J10, J11), none of these apply to the 1981-1989 Dodge D100. Failures on these older trucks are typically due to age and wear, not a specific manufacturing defect.
Frequently Asked Questions (FAQ)
Can I replace the D100 wiper motor myself?
Yes, this is a very DIY-friendly job for someone with basic tools. The process involves removing the wiper arms and the plastic cowl panel to access the motor on the firewall. The main challenges are potentially needing a wiper arm puller tool if the arms are stuck and working in a slightly tight space. The job typically takes 1-2 hours.
What is a 'park switch' and why does it matter?
The park switch is a component inside the wiper motor that tells the wipers when to stop at the bottom of the windshield. When it fails, the wipers will stop in whatever position they are in the moment you turn the switch off. This component is integrated into the motor, so a failed park switch requires replacing the entire motor assembly.
Do I need a special tool to get the wiper arms off?
Sometimes. The wiper arms are pressed onto a splined stud. After decades, they can become seized. There is a specific 'wiper arm puller' tool that makes removal easy and prevents damage. While some people can wiggle them off by hand, the tool is recommended to avoid cracking your windshield or cowl.
What's the most common ordering mistake?
The most common mistake is misdiagnosing the problem. Many owners buy a new motor when the only issue was a set of inexpensive plastic linkage bushings. Always check if you can hear the motor running first. If you hear it, the motor is likely fine and the bushings are your problem.
Technical Specifications
The wiper motor for this generation typically features a 2-speed operation and a 4-pin electrical connector. Ensure the replacement matches the connector on your truck's harness.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Dodge D100: