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S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004. |
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CEM Wiring/Repair InformationViews : 220164 Replies : 357Users Viewing This Thread : |
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#231 | |
New Member
Last Online: Feb 9th, 2016 13:20
Join Date: Aug 2013
Location: Fife
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#232 |
I do like a V40
Last Online: Dec 1st, 2018 19:03
Join Date: Oct 2013
Location: North Surrey
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If you've run power and the lights light up, then that would seem to suggest the wiring is ok south of the CEM. Is your replacement replacement CEM
![]() And what happens if you test the voltage at the bulb holder - test it across the holder with the lights on, with bulb in the holder and without and see if there is a difference in voltage. Also what year is your car?
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Current: '02 V40 1.9TD, '02 V40 T4 Previous: '00 V40 1.9TD, '99 V40 1.9TD, '97 V40 2.0CDi, '87 240DL |
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#233 |
moshmobile driver
Last Online: Apr 22nd, 2023 16:07
Join Date: Nov 2010
Location: Warrington
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This is how I diagnosed the faulty relay. Still have two going spare at cost price + P&P if needed.
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baldmosher™ Drives: 63 V60 R-Design Lux Nav P* 106K Kill List: 07 S40 SE Sport D5 120K V40 SLux 1.9D 306K V40 S 1.9D 152K VW T4 LDV Pilot Golf GL 1.9TD Saxo 1.1i Fiesta 1.0 Pop |
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#234 |
New Member
Last Online: Feb 9th, 2016 13:20
Join Date: Aug 2013
Location: Fife
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I've used 3 different CEM modules, all have been tested and work
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#235 |
New Member
Last Online: Feb 9th, 2016 13:20
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Location: Fife
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also its a 2003 1.9d sport v40
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#236 |
moshmobile driver
Last Online: Apr 22nd, 2023 16:07
Join Date: Nov 2010
Location: Warrington
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Confused now. If the CEMs don't work in situ, and you're getting light from the bulb by shorting in a live after the CEM, then how have you tested and confirmed that the CEMs work?
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baldmosher™ Drives: 63 V60 R-Design Lux Nav P* 106K Kill List: 07 S40 SE Sport D5 120K V40 SLux 1.9D 306K V40 S 1.9D 152K VW T4 LDV Pilot Golf GL 1.9TD Saxo 1.1i Fiesta 1.0 Pop |
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#237 |
I do like a V40
Last Online: Dec 1st, 2018 19:03
Join Date: Oct 2013
Location: North Surrey
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Not sure if you already have this, here's the pinouts for the CEM
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Current: '02 V40 1.9TD, '02 V40 T4 Previous: '00 V40 1.9TD, '99 V40 1.9TD, '97 V40 2.0CDi, '87 240DL |
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#238 |
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Last Online: Feb 9th, 2016 13:20
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#239 |
I do like a V40
Last Online: Dec 1st, 2018 19:03
Join Date: Oct 2013
Location: North Surrey
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What was the result of the bulb holder bulb in/out test?
__________________
Current: '02 V40 1.9TD, '02 V40 T4 Previous: '00 V40 1.9TD, '99 V40 1.9TD, '97 V40 2.0CDi, '87 240DL |
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#240 |
moshmobile driver
Last Online: Apr 22nd, 2023 16:07
Join Date: Nov 2010
Location: Warrington
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Are any of the contacts corroded or just dirty? "Lit" is not the same as "fully lit", so could be a bad connection somewhere, or maybe the wrong resistance is fooling the CEM somehow. Most multimeters will measure the resistance across a circuit, if one bulb lights and one doesn't, then you have a fair test for comparison of the Ohms.
Are you definitely absolutely sure it's not the switches failing? This sounds like a right pita
__________________
baldmosher™ Drives: 63 V60 R-Design Lux Nav P* 106K Kill List: 07 S40 SE Sport D5 120K V40 SLux 1.9D 306K V40 S 1.9D 152K VW T4 LDV Pilot Golf GL 1.9TD Saxo 1.1i Fiesta 1.0 Pop |
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