Turn signals stopped working

Sounds like the timer is bad. Since you have power when warm, the power relay must be giving the timer juice. The way it is suppose to work is you wait until the glow plug light goes out and then try to start. In cold weather it should take longer for the glow plug light to go out.

Old new beetle VW harness has contact resistance problems(vibration of wires) and needs to be recrimped the long wires(vibration can be stopped by silicone rubber anchoring). Cold weather make battery voltages low and needs recharged with handbrake on(headlamps off) 10 minutes warming engine up the whole winter.

Reason 1 - Gasoline, like any other liquid, evaporates less when it is cold.You have seen this -- if you pour water onto a hot sidewalk it will evaporate a lot faster than it will from a cooler place like a shady sidewalk. When it gets really cold, gasoline evaporates slowly so it is harder to burn it (the gasoline must be vaporized to burn). Sometimes you will see people spray ether into their engines in cold weather to help them start -- ether evaporates better than gasoline in cold weather.

Reason 2 - Oil gets a lot thicker in cold weather. You probably know that cold pancake syrup or honey from the refrigator is a lot thicker than hot syrup or honey. Oil does the same thing. So when you try to start a cold engine, the engine has to push around the cold, gooey oil and that makes it harder for the engine to spin. In really cold places people must use synthetic motor oils because these oils stay liquid in cold temperatures.

Re ason 3 - Batteries have problems in cold weather, too. A battery is a can full of chemicals that produce electrons The chemical reactions inside of batteries take place more slowly when the battery is cold, so the battery produces fewer electrons. The starter motor therefore has less energy to work with when it tries to start the engine, and this causes the engine to crank slowly.

All three of these problems can make it impossible to start an engine in really cold weather. People either keep their cars in heated garages or use "block heaters" to get around these problems. A block heater is a little electric heater that you plug into the wall to keep the engine warm.
i hope it was convince answers

Check your battery for proper volts (12.6). Sometimes the cold weather will bring a battery down. Also check the Starter Relay, again cold weather will make it stick causing it not to start. Those are the biggest problems with a car not starting in the cold weather unless you have something else going on then your starter and your ignition needs to be checked.

That happen to me 3 days ago. The problem is on the ignition key. When you turn it to start the engine, once the engine starts, turn it back a little. is suppose to get back by itself but, get stuck because the cold weather.

If it is happening more frequently in cold or damp weather it could be a spark issue. Wet or damp weather can effect spark plug wires if there is even minor damage to them (usually occurs durring rain). The other things that come to mind are the fuel pump and lastly the fuel line check ball that is in the fuel tank. If it is leaking then all the fuel in the line will drain back into the tank over night (pressure lost in the fuel line) and this will cause repeated, extended cranking when you first start the car in the morning or after the car has sat for several hours.

have fuel injection system cleaned

some diesels are like that i have a diesel truck i have to plug it it on winter does yours have a plug to plug it in that keeps it worl on winters so when you start in the morningsyou are all warmed up diesels are slow lazy starters need to get warmed up first but they are excellent cars will last longer than gas engines

I'd be real tempted to replace coolant temperature sensor, as it sends signal to ECM regarding engine temperature and fuel requirements pertaining to that temperature. For example, it tells ECM that engine is cold, send more fuel for cold start, but if it's defective, doesn't tell ECM to do so, or gives ECM the signal that engine is already warm, and doesn't require that extra fuel now for start up.

Check the condition of the wiring coming off of the ECM. at the fender. I've seen the wiring insulation rub off causing no starts.