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parasitic draw results

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R

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precopster
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Joined: 21 August 2010
Year and Model: Lots
Location: Melbourne Australia
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Re: parasitic draw results

Post by precopster »

Using the procedure from my earlier post that begins "You're almost there" will complete the diagnosis.

Is it that you don't understand what the instructions are or you find it hard to find all the wiring and connectors under the dashboard or elsewhere in the car?

You will need to use the meter (preferably 2 of them across the fuse numbers you mentioned while they are in current range) to look at the current readings with the fuses removed while disconnecting various circuits in the car.
Current cars VW Transporter 2.5TDI, 2010 XC90 D5 R Design

2ddorrance
Posts: 33
Joined: 1 April 2011
Year and Model: v70 XC 2001
Location: USA

Post by 2ddorrance »

I've pulled the fuses and know that it's fuses 24 and 32 that are giving me the problem. When I look at the wiring diagram I can't make heads or tales out of that or even where the other end leads to. I need to know how to get at the climate control sensor. All fans come on. I have both heat and AC. The problem lies somewhere when you leave the car. I will come back and turn the key and the heat will be on even though I know for a fact I shut it off. Same thing was happening with the AC in the summer.

I look at the diagram and it looks like a bunch of lines to me. My buddy who works on cars and engines all day long said the same thing except the uh "good luck with that".

Thanks!

draser
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Year and Model: 2005 S60 2.5T
Location: Detroit MI
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Post by draser »

Here's a way to go about this. On page 4 of the wiring diagram (WD) is a list of "type numbers" that tells you what the number to the left of the slash is. For exampe 2 is relays, 3 is switches, 4 is modules, etc. Then if you click on the link at the begining of the WD, under Fuses - fuses in eng. compartment 2:3 takes you to a bunch of tables. There you can look up fuse# 24 - Relay - extended X feed 2/29 and fuse#32 - CEM (Central Electronic Module).
From there, on page 23 you see the diagram for CEM, or module 4/56, that shows the relay 2/29, which when closed powers up the jonction 53/437. You'll see fuse#24 that gives juice to this relay contact.
Then on page 126 you find jonction 53/437, which in turn powers 5 circuits: 3/156:1, 4/52B:1, 3/112A:1, 5/1:1 and 54/3LF.
Then you can find the harness that carries the juice to the devices on page 136, and you'll see harness location and where the loads are.
From there you'll find all the devices that get power from fuse #24 on pages:
- 151 - load 3/112 - Climate Control Switch
- 153 - load 3/156 - Shifter Switch
- 154 - load 4/42 - Seat Module
- 155 - load 5/1 - Instrument Panel
And then, like said previously, you place the ammeter across the fuse holder - fuse removed, and unplug stuff to see which circuit take the extra current. You said you suspected climate control, so when you unplug that switch - 3/112 - you should see current go down to an acceptable value. Or maybe it' s one of the other loads. Good luck.
2005 Volvo S60 2.5T, Zimmerman/Akebono brakes
2012 Honda Accord, EBC slotted rotors

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