89 mustang 5.0-battery dies when the temp outside gets to about freezing?

Question

I have been replacing through Les Schwab the battery for the last 5 winters? I drive my car daily until the roads get icy. However, it does not matter, I can drive it one day and then that night the temp outside will get at or below freezing and the next morning, nothing, not even roll over. In the summer I can and have left it for a week and it fired right up. The local ford dealer said if it was a draw it would not matter the weather conditions. Any ideas, am I just using to small of a battery for car, it is the biggest one les schwab carries. Any help please?

Answer 1

you need to have the car checked to see if it has a draw or if the charging / elec systems are working properly this can get complex unless you have some elec exp

Answer 2

biggest doesn't mean best. buy a good battery, ive found interstate brand batteries perform well. i believe your car takes a 65 or 58 group battery, make sure you have the correct size cca ( cold cranking amps ).

Answer 3

Try a different brand of battery

Answer 4

its the alternator replace it the diod is not braking when the power is shut off.

Answer 5

Sounds like your cold cranking amps need to be bigger