1969-1974 Dodge D300 Pickup Back Up Light Switch Replacement Guide
If your reverse lights have stopped working, a faulty back up light switch is a likely and simple-to-fix problem.
- The most common symptom of failure is your reverse lights not turning on.
- Always check the bulbs and fuses before assuming the switch is bad.
- Replacement is simple and involves unscrewing the old switch from the transmission and installing the new one.
- New OEM parts are not available; Standard Ignition is a reliable aftermarket brand for this part.
Is Your Back Up Light Switch Failing?
A bad back up light switch has very clear symptoms. Because this is a simple on/off switch, it usually fails completely. Before you buy a new part, it's always a good idea to check that your reverse light bulbs are not burned out and that the fuse for the circuit is still good.
Symptoms of a Bad Back Up Light Switch
- Reverse Lights Don't Turn On: This is the most common sign of a failed switch. When you shift into reverse, the lights at the back of the truck do not illuminate at all.
- Lights Stay On: In rare cases, the switch can get stuck in the 'on' position, causing your reverse lights to stay on even when you are not in reverse.
- Intermittent Operation: The lights may flicker or only work sometimes when you shift into reverse. This can point to a worn-out switch or a loose connection.
Choosing the Right Aftermarket Switch
For a vintage truck like the 1969-1974 D300, finding new original equipment (OEM) parts from Dodge is no longer possible. The market for these trucks consists entirely of aftermarket parts. Fortunately, the back up light switch is a straightforward component that aftermarket companies can produce reliably.
Brand Spotlight: Standard Ignition
Standard Ignition (also known as Standard Motor Products) is a well-known aftermarket brand that has been making replacement parts for a very long time. Their switches are designed to be direct-fit replacements for the original part, which makes installation easier. They often use copper alloy conductors which provide good electrical performance. For a basic part like a back up light switch on a D300, Standard Ignition is a reliable and widely available choice.
Aftermarket Back Up Light Switch Cost for 1969-1974 Dodge D300
| Part Type | Our Price Range | Notes |
|---|---|---|
| New Aftermarket Switch | $33.21 - $37.88 | This is the most common and recommended option. Includes brands like Standard Ignition. |
| New OEM Switch | Not Available | These parts have been discontinued by the manufacturer. |
| Used OEM Switch | Varies | Can be found at salvage yards, but reliability is a gamble due to age. |
Pro Tip: Check Your Transmission Type
Before ordering, it's wise to visually inspect the switch on your transmission. While most parts for this year range are consistent, there can be differences between manual and automatic transmissions, or changes made by previous owners. Confirming the number of electrical pins and the thread size can prevent ordering the wrong part.
Frequently Asked Questions
Where is the back up light switch located on my D300?
On rear-wheel-drive trucks from this era, the back up light switch is almost always screwed into the side of the transmission housing. You will need to safely get under the truck to see it. It will have an electrical wire connector attached to it.
Can I replace this switch myself?
Yes, this is a very DIY-friendly job for most home mechanics. The process involves safely jacking up and securing the truck, unplugging the electrical connector, and using a wrench to unscrew the old switch. The new switch is then installed, but be careful not to overtighten it, as the transmission case is typically made of aluminum.
What happens if I don't replace a bad switch?
Your reverse lights will not work. This is a significant safety issue, as other drivers and pedestrians will not be warned that your truck is backing up. It can also cause you to fail a state vehicle inspection.
How do I test the switch before replacing it?
A simple test is to disconnect the wiring harness from the switch and use a small piece of wire (a jumper wire) to connect the two terminals in the connector plug. With the key in the 'on' position (engine off), this should complete the circuit and turn the reverse lights on. If the lights come on, the switch is bad. If they don't, the problem is likely in the wiring, fuse, or bulbs.
Technical Specifications
Typically a 2-pin or 3-pin screw-in switch located on the transmission housing.
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.