Battery Drain Issue
Hello,
I currently have a 1991 230ge lwb 463 model and for the past month I been having a battery drain issue. Its usally not a issue if I drive the G everyday but if I don't drive it for one day the battery will get drained down to about 11v.
I already replaced the alternator, starter, and battery. Doing a parasitic drain test on the G shows that 1.16 amp is being drained while the G is off. Taking off the fuses didn't seem to lower it, but rather taking off disconnecting relay I ABS did lower it down to .65 amp.
I figured it may be the disconnecting relay I ABS but after switching it with disconnecting relay II ABS the drain goes back up to 1.16 amp.
I am not sure where to go from here, it feels as though the problem is simple and close by but I just can't see it.
I attched a picture of the battery, on it you see there is a thin red wire and a thick red wire. The thin wire is for the lpg and the thick red wire controls the fuses and stuff inside. My questiong is, the that red wire suppose to be directly connected to the battery?
The second picture is the relay for the disconnecting relay I ABS, I looked up the number but could not find another one like it, what other relay could subsitute for it?
thank you!
Can only help on the Relay...
HELLA
4RD 003 520-01 and 4RD 003 520-017
Cross refer to MB A000 545 83 05 and A000 545 86 05 and A002 542 74 19
The last number is circa £8.70 + vat from MBUK and is just a Generic 12 volt relay
Any German MB dealer should stock it also...
Not that i am faulting the GWOA and pleased you are here, just curious that if you are in Germany is there not much and plentiful information on forums over there?
Gav
Do you have an after sale alarm fitted??, Have you checked the central locking system for undue drain when activated?? any telephone ot satnav left on??
Can only help on the Relay...
HELLA
4RD 003 520-01 and 4RD 003 520-017
Cross refer to MB A000 545 83 05 and A000 545 86 05 and A002 542 74 19
The last number is circa £8.70 + vat from MBUK and is just a Generic 12 volt relay
Any German MB dealer should stock it also...
Not that i am faulting the GWOA and pleased you are here, just curious that if you are in Germany is there not much and plentiful information on forums over there?
Gav
Gav,
thank you for info I will check out the MB dealer. I am sure there is but I just moved to Germany recently for work and my German need more work them G does
Hi rkl786.
You mentioned that you have checked all the circuits and associated fuses. May be you could try to check this. Disconnect the earth terminal from the battery and attach one lead of a test light to the cable end. Touch the other lead to the battery earth terminal pole. If the light glows, there is a constant drain. If the drain remain undetermined, the problem is likely a sorted starter solenoid or a short in the wiring to the solenoid. Inspect the wiring and connections. If no short is found disconnect the wires from the solenoid until the light goes out.
Try removing the fuse for permanent 12v to the clock and car radio.
Some radios become faulty, particularly the Becker Traffic models and draw high currents when they should be off.
I attched a picture of the battery, on it you see there is a thin red wire and a thick red wire. The thin wire is for the lpg and the thick red wire controls the fuses and stuff inside. My questiong is, the that red wire suppose to be directly connected to the battery?
thank you!
It does not look tidy to attach wires directly to the battery but looking at your picture, a fuse has been circuited into the line, so that is fine.
It could be the relay at fault or what ever is after the relay circuit. If this is four or five pin relay you could possibly test the relay out. Alternatively, without refereeing to a wiring diagram, I am assuming it will be the wheel sensors after the relay in which case unplug one by one the wheel sensors and check for battery draw.
As you have had all the fuses out and with no change in battery draw, then it suggests to me that the draw is on an un-fused circuit but you have changed the battery, starter and alternator - I am thinking on your Over Voltage Protection (OVP) relay, this is the one with a 10amp fuse mounted on the top of the relay.
a couple of posts before this someone said use a test light
If you have not got one just use a sidelight bulb. Put the little pin on to the battery negative terminal and the negative lead to the side of bulb
With your short it should light up. Next get someone to remove fuses and when the light goes off you have found the supply that is a possible fault
Check all items that relate to that fuse
Too easy let me know how it goes
I attched a picture of the battery, on it you see there is a thin red wire and a thick red wire. The thin wire is for the lpg and the thick red wire controls the fuses and stuff inside. My questiong is, the that red wire suppose to be directly connected to the battery?
thank you!
It does not look tidy to attach wires directly to the battery but looking at your picture, a fuse has been circuited into the line, so that is fine.
It could be the relay at fault or what ever is after the relay circuit. If this is four or five pin relay you could possibly test the relay out. Alternatively, without refereeing to a wiring diagram, I am assuming it will be the wheel sensors after the relay in which case unplug one by one the wheel sensors and check for battery draw.
As you have had all the fuses out and with no change in battery draw, then it suggests to me that the draw is on an un-fused circuit but you have changed the battery, starter and alternator - I am thinking on your Over Voltage Protection (OVP) relay, this is the one with a 10amp fuse mounted on the top of the relay.
Was the relay energised ?
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No after sale alarm, no telephone, or satnav. I disconnected the central locking system and the amp did not go down.
Also yesterday I check to make sure again and the central locking does turn off when the doors are closed.