Just bought this car used and thought I was getting a good deal. LOL It had a dead battery and I installed a new one and after a couple days the battery drains and will not start. completely dead. I have did the alternator test by removing the positive cable to it. What I am trying to find out is should there be any kind of short when you hook up a test light after taking off the negative cable and connecting a test light from the cable to the battery. Thanks Milton
Do not disconnect the positive Or negative cable while vehicle is running it is no longer an acceptable test and damage to computers could occur as there is no ability to suppress or absorb a voltage spike. If you remove the negative cable to check for an amperage draw that's an other thing. You should use a meter and connect it in series between the neg post and the neg cable once all modules are in sleep mode there should be no more than .3v as a rule of thumb. If more you have a parasitic draw which you could isolate the system/circuit by removing fuses one at a time. When the draw is gone that's the circuit in question.
Thanks a ton for the reply.
Here is a update
When I was checking for a short the first time I was doing it by touching the negative cable to the battery post and seeing a spark.
Left the cable off and got a full charge on the battery and car set over night this way.
Got a volt meter to check it and there was now no short so hooked the battery back up, Cranked the engine, Turned all the light on and off and then check the voltage, 12.69 volts and this morning voltage is 12.65, Hate it when things fix there self and I know it will happen again. LOL
Another problem I have is weak low beam head lights, Can someone tell me if the low beam light go through a relay, One of the connectors at the light bulb was melted and I replaced it but they are still dim.
×
Pls can anyone tell me the battery amperage suitable for my mitsubishi galant 2001 (2.4L engine) car?
SOURCE: The battery keeps going dead on 1999 Mitsubishi
There is an alternator fuse located on the positive battery clamp or in the fuse block under the hood. if it is part of the positive battery clamp it is a dealer only part and will run $10 to 20 dollars. If it is in the fuse block you should be able to get one at the auto store and modify it to slide in easily. Get a flash light and check all of your fuses carefully. The blown fuse may be hard to spot. The design of the car lets the battery go dead with out even turning on the charge light on the dash to let you know you are not charging the battery.
SOURCE: I have an 2001 galant
not sure these are related. battery light is due to alternator failure. Oil light is due to oil pump wear. The oil pump may work OK for a couple more years. Replace it if it gets much worse (if light comes on above 1000 rmp). The alternator must be replace now.
1,585 views
Usually answered in minutes!
Another update and hope someone can help me.
Found out that with the ignition off and lights on they will not cut off.
Got up this morning to another dead battery and when I got it charged and put the negative battery cable on I could hear a clicking, Fount it to be in the front ECU and the lights would stay on and never go off. When I turn the light switch off the ECU disconnects.
Could this be a bad ECU or something else.
Thanks
could be a recall for the wiring harness that runs under rear seat on drivers side. wires would break and cause a short and draw on the battery
×