mornin all,ive got a 95 155,if i leave it for 2/3 days the battery goes flat,ive put a new battery on,still the same,there is no sign of discharge and the alt is charging well,boot and glovebox lights arnt staying on,any ideas?
<NERD glasses on> Well I ran a few calculations... and assuming that the battery in the 155 is 45Ah, and it runs flat over 2.5 days (60hrs.), then the source of the drain is taking 0.75Ah. That would equate to 9W's of a power draw... so the boot light is a distinct possibility! (It's 5W though as far as I remember, but the battery may not be fully charged, so anything between 5 and 9W would be about righ!)... <NERD glasses off>
cheers for your answers chaps,it first happened when i went away for 10 days,ive had the car for 2 years now,nothing has been changed and nothing showing on the ammeter so must be a small discharge,oh well back to disconnecting the batt at night.
What was the current drawn from the battery when you measured it last?
Can you also test it when the car in in the state you normally leave it overnight... Put tape over the bonnet lift button for the alarm, and lock/alarm the car. Measure it at that point and tell us the values.
acording to my ammeter there is no draw worth mentionning,just enough to keep the radio and clock alive,bonnet light dosnt work and no other lights are staying on,alarm has never worked.
it all started some months ago when i left the car for 10 days,batt was completley flat on my return,kept going flat after that,changed battery under waranty and put another AC DELCO on,still doing it now.
i dont use the car every day
I wonder if the alternator is having problems recharging the batt.
Try run a test on the voltage when the battery is in the car but without load. Then run the engine on idle, measure. Then increase the rev's to 2500 and turn on the main beams and wipers and rear window heaters, measure the voltages again. Post the three results here.
One side of your rectifier/voltage regulator in the alternator may be bust.
...or... maybe the battery was let run flat, and never got a good recharge (short driving distances) and hence the reoccuring problems.
update,left the car for a few days with battery off and its fine,when you connect battery up again the n/s/f central locking clicks,before i rip it to bits is it the solenoid going to need replacing or is there some adjustment,doors all lock/unlock fine,ps there is a 90ma draw with everything off and doors locked