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CEM Wiring/Repair Information

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Old Jul 11th, 2012, 17:09   #101
1066harold
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Thumbs up CEM headlight issue

Guy's I brought my CEM from Ebay working no issues
cost and this is true £5.00 post £0.99 for the item
total £5.99
right chuffed
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Old Jul 11th, 2012, 17:43   #102
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Well done, I got £40 for mine! Took a while to sell though
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Old Aug 13th, 2012, 12:23   #103
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With one dim dip headlight down, I replaced both dim dipped relays on the CEM with RS Component's part number 2172876 at a cost of less than €10, got a friend to solder them in and it worked a treat! Thanks once again to all who posted to this thread and others.
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Old Aug 14th, 2012, 01:55   #104
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How do you take the old relay out? and how do you replace it with another?
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Old Aug 14th, 2012, 02:01   #105
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You will need a soldering/de-soldering iron. If you have never soldiered before it's not the easiest job to do
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Old Sep 22nd, 2012, 13:03   #106
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Hi all and thanks for the info Russell. I too have a suspected CEM problem but I'm unable to track down a replacement for this particular part number (30621304) which appears to be for the LHD version and the only ones I can find are in America.

I'm beginning to wonder if I have the correct CEM in place and would be grateful if anyone can confirm the part number. My car is a 2002 V40 1.9D S, registration number WK02 MZX.

I changed the bulbs and can confirm the new ones are working (tried a different CEM that I thought might work 30858700) but it left the lights on all the time and a meter read at the fuses is showing no power.

Many thanks in advance
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Old Sep 22nd, 2012, 15:50   #107
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Depends what your Chassis number is. Check the last 6 numbers on your VIN.

See here:
Control unit [-2001, L.H.D (30859699)] 30896697
Electronics box [2002-, L.H.D (30621304)] 30638707
Control unit [-2001, R.H.D (30859700)] 30896698
Electronics box [CH 800000-026445, R.H.D] 30621305
Electronics box [CH 026446-, R.H.D] 30638708

Yours will either be the 30621305 or the 30638708

I think I have both in case you want one and I can enable/disable the fogs, rear wiper etc
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Old Sep 22nd, 2012, 21:46   #108
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I am 99 % sure that only difference between LHD and RHD version is in housing - position of mounting tabs.
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Old Sep 22nd, 2012, 21:50   #109
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Quote:
Originally Posted by sebaveh View Post
I am 99 % sure that only difference between LHD and RHD version is in housing - position of mounting tabs.
I think so too.
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Old Sep 23rd, 2012, 10:55   #110
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Quote:
Originally Posted by keefer View Post
Hi all and thanks for the info Russell. I too have a suspected CEM problem but I'm unable to track down a replacement for this particular part number (30621304) which appears to be for the LHD version and the only ones I can find are in America.

I'm beginning to wonder if I have the correct CEM in place and would be grateful if anyone can confirm the part number. My car is a 2002 V40 1.9D S, registration number WK02 MZX.

I changed the bulbs and can confirm the new ones are working (tried a different CEM that I thought might work 30858700) but it left the lights on all the time and a meter read at the fuses is showing no power.

Many thanks in advance
is your car a LHD ? I have a feeling it may be an import ... and not visited a volvo garage over here ..
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