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I can't say anything is wrong with having the head lights on when starting the car. However I personally don't recommend having the headlights on when starting the car because you're putting a huge load on your battery and drawing current from many related engine components that are needed when you start your car. Many cars headlights will automatically come on when the engine is started but I would hope and think that these cars have some sort of delay that wont allow the headlights to pull a load from the battery until the engine is running. In fact I own a 2002 Blazer and when it is dark if you turn the ignition on the headlights will come on and when you turn the key to start it the headlights seem to drop out momentarily until the engine starts. I would think that the Blazer is designed for this then again to know for sure I would have to call or consult a pro.


As long as you have a good battery and turning your lights on don't affect the starting of your car then it won't cause any problems,


There is absoultly nothing wrong with turning on the head lights before u start the car because on a cold morning say 10 - 15 below this actually warms up the battery by putting a load on the battery and causing a chemical reaction that warms up the battey and thus allowing the battery the ability to start the car more effectivly. note: the battery must be sufficient for the car or it will not work find out how many amps your starter pulls and get the battery that pulls twice the amperage or cca(cold cranking amps) thisis displayed on the top of the battery labeled either ca or cca (cranking amps or cold cranking amps.)

Gee, I have been servicing cars for about 40 years and never heard that turning the headlights on when the temperature outside warms up the battery. When you are starting your car in extremely low temperatures, you want as much battery power as you can get to go to the starter. Headlamps draw the most current , besides the starter, in a car. Leave the headlamps on at 20 below for 1 hour and you will have a dead battery. Leave the lights off and everything else until the car starts,,,after a few seconds when the engine is running turn things on EXCEPT the lights until you are going to drive. Any charging from the alternator will be used to power the lights and the battery will not recover from the start correctly.

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โˆ™ 2013-03-30 17:33:03
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Q: Is there anything wrong with turning on the headlights before starting the car?
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