Neutral Safety Switch / Backup Light Switch

Ever wonder why we don’t need to know what kind of transmission you’re using with a Classic Update kit?

All Classic Update kits will accommodate a neutral safety and backup light switch, as well as an automatic or manual transmission.

The most common location for these switches is either the base of the steering column for a column shift car, or inside the console (or on the side of the transmission) for a console shifter. Some applications use a combination backup/neutral safety switch, while others use standalone parts.

The connections are similar for either style, and each Classic Update will include enough wire in the dash to work with either option. As with the rest of the harness, the function and color are clearly labeled both on the wire and in our instructions.

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The neutral safety is an on/off switch that has continuity when the gear selector is in park or neutral, so you can easily check your switch with an ohmmeter to determine if it is working. If the switch has no continuity when the car is in park or neutral, your linkage is out of adjustment, or you have a faulty switch.

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Some vehicles use a combination backup/neutral safety switch. If you want to determine which terminals perform what function, you can use your ohmmeter to check for continuity between the terminals to figure it out. Simply move the switch lever through each position and watch for continuity on your multimeter.

The backup light switch is similar in that it is also an on/off switch. In the “on” position, the switch allows current to flow from the pink wire (this is the 12 volt power source) to the backup lights when the gear selector is placed in reverse.

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When the gear selector is moved to reverse, power flows through the switch to the light green feed wire on the output side of the switch. This is what makes the lights at the rear of the car work when you’re backing up.

AAW – making parking lots safe one switch at a time!