Transmission
Neutral Safety Switch
A neutral safety switch stops the engine from cranking unless the transmission is in park or neutral, and on many vehicles it also turns on the backup lights. We carry 38 switches from $15 to $409 from Standard Motor Products, Forecast, AC Delco and Motorcraft, with strong coverage for Ford F250 and Jeep Cherokee.
Shop neutral safety switch by vehicle
DIY Solutions Neutral Safety Switch BSS00826 for Jeep Cherokee
Fits 1997–2001 models
What the switch does
The neutral safety switch is a simple electrical switch tied to the gear selector. When you are in park or neutral it closes the starter circuit so the key can crank the engine. In drive or reverse it opens that circuit, which prevents the vehicle from lurching forward on startup. On many models the same switch also powers the reverse lights when you shift into reverse.
Common symptoms
The best known sign is an engine that will not crank in park but does crank in neutral, or the other way around. Other signs are an intermittent no-crank, needing to jiggle the shifter to start, and backup lights that stop working.
A weak battery, bad starter or loose shift linkage can cause similar trouble, so check those first. A misadjusted switch can also act like a failed one.
Fitment and installation
Switches differ by transmission, mounting location and connector. Some mount on the side of the transmission, others on the steering column or floor shifter. Compare the plug and mounting holes with your old switch, and check the fitment table for your engine and transmission.
Set the parking brake and disconnect the negative battery cable before you begin. Some switches have slotted holes and must be adjusted so the engine cranks only in park and neutral. Test that it will not crank in any drive gear before you finish.
Neutral Safety Switch questions
Why will my car only start in neutral?
This is a common symptom of a worn or misadjusted neutral safety switch. The park contacts inside the switch stop closing properly. Adjusting the switch sometimes fixes it, but a worn switch usually needs replacement.
Is the neutral safety switch the same as the backup light switch?
On many vehicles one switch handles both jobs, which is why some listings call it a backup light switch. Other vehicles use separate switches. Check the fitment details and compare the connector to your old part.
Can a bad neutral safety switch drain my battery?
It is not a typical cause. A failed switch usually prevents cranking or stops the backup lights from working. If your battery keeps draining, test for a parasitic draw before replacing the switch.