[W126 Coupe] Long term Battery drain problem

[Vance Rowley]

Hi Jim,

  Good point. I don't think your idea is "off the wall" at all. I think it could well be a very good possibility. I will put it on my list of things to check out.

Cheers,
Vance.
 
----- Original Message ----- 
From: "Jim Ham" <jimham at porcine.com>
To: "Vance Rowley" <vance.rowley at tiscali.co.uk>; "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
Sent: Tuesday, March 14, 2006 4:35 PM
Subject: Re: [W126 Coupe] Long term Battery drain problem


> I'd take a close look at the wipers. 6A is about right for a stalled wiper 
> motor. The parking switch is a wiping contact, so with age or misadjustment 
> the contact may be on the hairy edge of making or not making when the 
> wipers are mechanically parked. Under these conditions temperature and 
> humidity could cause the contact to intermittently make.
> 
> This may seem off the wall, but it seems that most solutions at this point 
> are pretty implausible.
> 
> Regards,
> 
> Jim Ham
> 
> 
> At 07:36 AM 3/14/2006, you wrote:
>>Hi Steve,
>>
>>  I was thinking about that, but I think I might try the rear heated 
>> window first just to prove the theory on that one either is,or isn't correct.
>>Thinking about it, you are most likely correct about the contacts being 
>>corroded or poor to say the least. One thing I didn't mention previously 
>>is the last time I drove the car and needed the rear heated window to 
>>de-mist, it didn't seem to be working very well. It used to. So putting 2 
>>and 2 together, bad contacts would certainly be suspect on that one. 
>>Trouble is though, with this relay having a timer built into it, it ties 
>>in with the intermittent current draw and could be more likely the timer 
>>circuit coming on and off randomly and still feeding the heated window. 
>>Only difference being it's not getting the full current because of bad or 
>>dirty contacts.
>>
>>All speculation at this point, but once I have tried replacing the relay 
>>and pulled fuse#3 and got a result (one way or the other) I will take it 
>>from there and then open up the relay.
>>
>>Thanks,
>>Vance
>>
>>
> 
> <snip>
> 
> 
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