2003 ford focus. battery light comes on but dimly lite
Seems in cold weather, after a couple a minutes, usually at night with heater fan, rear defroster, and lights, the battery light starts to glow dimly, not bright like when you turn engine on, and stays on most of time, even for a minute or two after you turn engine off. may not happen next time, but seems more consistent in cold weather.... dealer tested everything, but it wasn't happening when he had the car in a nice warm shop. took it to local mechanic but stopped by time he got chance to look at it. battery tested ok for him and only thing he noticed alternator dropped once or twice below 12.5 volts for him with draw on it for a couple seconds. but again, it was a warmer day for him
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check the condition of the key battery as it may be low in cold weather and not communicating properly with the immobiliser.. I suggest this because batteries generally fail more often in cold weather compared to warmer climates.
I do not understand why people will continue to operate a vehicle when they know there is an obvious problem. They ignore check engine lights until the engine stops running altogether and then are "surprised" when they get stranded in the middle of the expressway in rush hour traffic. Then they blame it on the car!!!
In your case, you have ignored the warning signs of your blower motor failing ("making noise for a couple months"?) and now you are dumfounded as to why your blower motor now does not work at all.....I don't get it....!???
You are at the beginning of a charging system problem. Items included are Alternator, battery, drive belts, wiring and ground circuits.
If you are a backyard guy, pull the alternator and get it bench tested.
The Toyota Service Bulletin is 059633, dated March 13, 2003. My 2003 Corolla has the same problem. When the lights were on this morning after a very cold night, I jiggled the headlamp switch and sure enough, the headlights turned on and off. I found that the lights can be kept off if the switch is pushed forward and left in the "high beam" position when the car is off and the weather is expected to be cold. This is easier than pulling the fuse every time, until the switch can be replaced. It worked for me. Hope this helps.
Although I'm questioning why it would be doing this mostly on cold mornings, I would suggest that you check your battery connections. 99 times out of 100, the reason that this happens is because one of the battery cables does not have a good connection (Many times it's the ground wire). If you check to make sure that the connections on both ends of both cables are tight, then try taking your vehicle to your local parts store to have them do a load test on your battery. It's possible that the c.c.a. (cold cranking amps) are no longer sufficient to start your car. After awhile, batteries tend to lose their charge due to age, how many times it has been discharged completely, and also frequent cold weather. I believe that this should solve things, but feel free to contact me to ask about any other possibilities that may be causing this, as I'll look into any other similar common issues on your particular make and model. Should be battery cables or battery itself, though. Hope this helps and have a great day!