[Grapenut]

Hi folks new member here thanks for the invite! I need your help! I have a 2006 TSX with a starting issue. After sitting for 2 or more days the car wont start, battery is low. Alternator is charging at 14 volts. Battery is only one year old. Changed out starter thinking maybe it is drawing too much power? Also disconnected bluetooth module as this was thought to possibly cause battery drain. Only other issue with the car is door locks on passenger side don't work. Could the car alarm be an issue, causing drain? What else can i check? Any help is greatly appreciated!!!

 

[Grapenut]

Update! I checked battery draw with multimeter. Fuse 6(interior lights) is drawing 0.2 amps. Is this enough to drain the battery? Thanks again!!

 

[Litespeed08]

Yes, any draw is enough to drain a battery. It just depends on the sum of all other factors combined. Like how big is your battery? What's the current level of charge/voltage? What amperage and voltage does your car require to start? Etc...

To verify if the 0.2 amp draw is your issue just charge your battery, remove your fuse and then reinsert it after 2 or more days and see if your car starts.

 

[merlinj79]

Update! I checked battery draw with multimeter. Fuse 6(interior lights) is drawing 0.2 amps. Is this enough to drain the battery? Thanks again!!

.2 A (200 mA) is too high. I'd expect no more than 50 mA on a car that old.

Should probably get the wire diagram and see what all is on that fuse.

Or just replace all the interior bulbs, might have a bad bulb that's drawing current but not lighting up... might have a dome or aux light switch on but not notice it. Bad bulb could make heat but no light.

 

[Litespeed08]

A lot of references use the 50 mA parasitic draw as a limit, 30 mA is ideal. Definitely troubleshoot as many fuses for their current draw or take it to a capable electrical mechanic. It can be a time-intensive activity but well worth it. You have to have patience as I've been down this route several times.

 

[deskiol]

You failed to remember one vital stage. Most vehicles have different modules, (PCs), in them now, and a portion of those modules stay empowered for as long as 10 minutes when the battery is detached. This is particularly valid for the SDM, (Detecting and Demonstrative Module, otherwise known as air pack module). You want to trust that these modules will shut down prior to checking for a parasitic draw, any other way you might analyze a flawed module when you eliminate the circuit for that module just to figure out that the substitution module is doing likewise on the grounds that you're not permitting it to shut down.



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