Q: Won't start. Replaced starter and relay switch, still won't start. Tested battery and it's good.

asked by on

We have a 2001 Nissan Pathfinder and it won't start. We have replaced the starter and the starter relay switch. We have tested the battery and it's good. It doesn't make a noise just won't start. Any suggestions on what we can try next?

My car has 158000 miles.
My car has an automatic transmission.

A: Hey there, thank you for asking about your ...

Hey there, thank you for asking about your 2001 Nissan Pathfinder. You should check fuse number 18 in the fuse panel under the dash. Test the black and yellow wire at the start interrupt relay to see if it gets power when you turn the key to start. If it does, then you are getting power from the ignition switch. Then check the black and pink wire at the relay to see if you get power when you try and crank the engine. If you get no power, then you may have a bad neutral start switch on the transmission. Try to move your transmission through gears and neutral while trying to crank it, holding the brake in case it starts. If you find it will start in one of the gears, then check the shift linkage. If it's okay, replace the shift interrupt switch on the transmission. If you want to have this checked by a certified mechanic, a technician from YourMechanic can come to your home or office to inspect your starting problem.

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: New battery losing power

When the charging system indicator comes on the majority of the cases are caused by a faulty alternator. I suggest having the starting and charging system tested by a technician. When the battery was installed a connection it may not...

Q: Engine cranking but no spark (no trigger signal )

Hello and thanks for contacting YourMechanic. The trigger for your ignition system lies within the computer system. Your computer is not allowing the ignition to trigger the power. The coil should have power to it and a ground wire. The...

Q: Sunroof has stopped working

The system is powered by the #8, 10 amp fuse located under the dash on the left side of the fuse box. This fuse powers the power window relay in the same box, then a circuit breaker powers through the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.