What is the cause of fully charged battery sudden run down in automobile?
This might be due to the faulty charging system. It won’t be able to charge the battery as fast as the battery is draining. This will eventually lead to the car battery draining fully and leaving you stranded in the middle of nowhere. If the alternator belt is loose or it is faulty, the battery won’t charge properly.
What causes a car battery to drain in the morning?
If your alternator has a bad diode, your battery can drain. The bad alternator diode can cause the circuit to charge even when the engine is shut off, and you end up in the morning with a car that won’t start. 5. Extreme Temperature
Why is the temp gauge on my Saab not working?
However is the temperature information used by the ECU for correcting idling speed, controlling radiator fans determinating injection at different phases etc., so if nothing abnormal is seen it may not be the ECU. The stepping motor – tja. Unplug the connector at the sensor, at cold, not running engine, and note any change of the gauge reading .
Can a bad alternator drain a car battery?
A car alternator recharges the battery and powers certain electrical systems like lights, radio, air-conditioning, and automatic windows. If your alternator has a bad diode, your battery can drain. The bad alternator diode can cause the circuit to charge even when the engine is shut off, and you end up in the morning with a car that won’t start.
When does a car battery lose its power?
3. Disuse If you’ve let your car sit idle for awhile without using it, usually at least two weeks or more, then your battery might have lost enough power that it can no longer start your engine.
What makes a Saab 9-3 battery drain while parked?
Saab 9-3: Battery Draining While Parked 1 Battery Cables. You’ll want to take a look at your 9-3’s battery posts where they bolt to the battery. 2 Bad Battery. When the battery drains when parked, the odds are that it’s the battery itself. 3 Alternator. 4 9-3 Battery Draining While Parked.
Is there a problem with my Saab 93?
SAAB 93 has a problem with the battery draining completely intermittently over the last few months but now every time it is parked overnight. Has been checked by SAAB main dealer who can not find anything but suggest new radio ( at my expense ) which may or may not solve it. Have any of your experts anything they can add to help solve this.
How do I put my Saab 93 in sleep mode?
Attach your multimeter (Selector and wires in the AMP setting) between the negative cable and the negative battery post. Wait a few seconds to several minutes (up to 15min in some cars) for the car to go into sleep mode – i.e. when you make the contact with the ammeter, the cars computer systems “wake up”.
Where is the radiator fan relay on a Saab 93?
There’s another radiator fan relay for slow speed marked “D” but that shouldn’t be behind a maxi fuse. The high speed relay could be bad. The fan is commanded on by a temperature switch in the engine block.