Dodge D150 Back Up Light Switch Guide (1983-1993)
Having trouble with your reverse lights? Here's what every 1983-1993 Dodge D150 owner should know about the back up light switch.
- The most common cause for reverse light failure on a 1983-1993 D150 is a bad back up light switch.
- Always check the bulbs and fuses first before assuming the switch has failed.
- Replacement is a simple, DIY-friendly job that requires basic tools and about 30 minutes.
- OEM parts are likely unavailable, making a quality aftermarket brand like Facet the go-to choice.
Is Your Dodge D150's Back Up Light Switch Failing?
If your reverse lights are acting up, the back up light switch is a likely suspect. On these classic Dodge trucks, the electrical system is straightforward, and this switch is a common wear item. Over time, the internal contacts can corrode or wear out, leading to failure. Before replacing any parts, it's always a good idea to check the basics first: make sure the bulbs aren't burnt out and the fuse is intact. If those are good, the switch is the next logical part to test.
Safety First
Non-working reverse lights are a safety hazard, reducing your visibility and making it hard for others to see you're backing up. It can also cause you to fail a state safety inspection. While the truck is still drivable, this issue should be addressed promptly.
Symptoms of a Bad Back Up Light Switch
- Reverse lights don't turn on: This is the most common symptom. You shift into reverse, and the lights stay off.
- Lights stay on constantly: The switch can fail in the 'on' position, causing the reverse lights to stay illuminated even when you're not in reverse.
- Lights work intermittently: The lights may flicker or only work sometimes, indicating a worn or failing switch.
Choosing the Right Aftermarket Switch
Finding a new OEM Mopar back up light switch for a truck of this age is difficult, as many parts like this have been discontinued. This makes a quality aftermarket part the most practical and available option. Brands like Facet produce replacement switches designed to meet or exceed the original specifications. When shopping for an aftermarket switch, the most important factor is ensuring it is listed as a correct fit for your D150's specific year and transmission type (manual or automatic), as the switches can differ.
Pro Tip: Test Before You Replace
You can test the switch before buying a new one. Locate the switch on your transmission, unplug the electrical connector, and use a small piece of wire to jump the two pins in the connector with the key on. If the reverse lights turn on, the switch is bad and needs replacement. If they don't, the problem lies elsewhere in the wiring or bulb sockets.
Replacement Cost
Replacing the back up light switch is an affordable repair. The part itself is inexpensive, and if you have it done by a mechanic, the labor is minimal.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Switch | $26.65 |
| Shop Labor | $50 - $100 |
| Total Estimated Cost | $76 - $126 |
Cost estimates are approximate and can vary based on your location and the specific rates of your repair shop.
Frequently Asked Questions
Where is the back up light switch located on my Dodge D150?
The switch is mounted on the transmission. For automatic transmissions, it's typically on the driver's side, integrated with the neutral safety switch where the shift linkage connects. For manual transmissions, it is a separate switch, usually screwed into the transmission case.
Is this a difficult part to replace myself?
No, this is a great DIY job for most owners. It usually requires basic hand tools, like a wrench or a deep socket. You'll need to safely raise the truck for access, disconnect the wire, unscrew the old switch, and install the new one. Some transmission fluid may leak out when the switch is removed, so have a rag ready.
Do I need a special tool to replace the switch?
Typically, no special tools are needed. A standard wrench or deep socket set is usually sufficient to remove and install the switch. The Facet switch often requires a 22mm wrench.
My reverse lights still don't work after replacing the switch. What now?
If a new switch doesn't solve the problem, you need to check the rest of the circuit. Start by re-checking the fuse and bulbs. Then, inspect the wiring running from the switch to the tail lights for any breaks, corrosion, or bad grounds. The bulb sockets themselves can also corrode and fail to make a good connection.
Technical Specifications
OEM Part Numbers: 4373814
Location: Transmission case. On automatic models, often integrated with the neutral safety switch. On manual models, it is a standalone switch.
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.
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