Will not start in cold weather?

Hi,

When you say it won't start and you have to jump the starter motor, that doesn't sound related to a crankshaft position sensor. Instead, it sounds more related to the neutral safety switch, or the starter may be failing.

Am I correct that when this happens, the starter doesn't work?

If I am, here is what I need you to do. When this happens, first see if it will start in neutral. If it doesn't, make sure the Batt 1 fuse in the under-hood fuse box is good, tight, free of corrosion, and check to see if power goes both in and out of the fuse. If it appears good, wiggle the fuse and see if it starts.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If that checks good, then I need you to get a helper. Have the helper turn the key to the start position while you check for voltage at the purple wire on the starter. That wire should only have power when the key is in the start position.

If you find that the wire does have power, replace the starter. If there is no power, we need to work backward to the neutral safety switch to confirm power is present there and then to the ignition switch.

I attached the wiring schematic below for the starter circuit, so you have a reference.

Let me know what you find.

Joe

See pics below.