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This listing is for 30859700 (Twin Headlamp) CEM Central Electronic Module and 1st Class Signed for delivery with Royal Mail this part comes with a 5 year warranty after using these replacement relays for a few years now i can stand behind them with confidence.
If you have a unmolested CEM (i.e. you have not tried to repair yourself) which you would like to return to me at your cost I will refund you 20 back from this purchase so i can repair your broken CEM.
The CEM was fitted on all S40 and V40s from mid 1999-2004.
30896698 & 30859700 – for cars up to 2001
30621305 – for cars with chassis numbers from 800000 to 026445
30638708 – for cars with chassis numbers from 026446 on
For left hand drive cars CEMs 30896697 and 30859699 are the equivalent to 30896698 and 30859700. CEM 30621304 is equivalent to 30621305 and 30638708. The electronic board is identical. The only difference is on the positioning of the mounting brackets on the CEM.
The two relays in the CEM that control the dipped beams will be replaced with brand new Panasonic relays.
Please contact me if your problem is not the dipped beams relays.
If you are not 100% sure that the CEM relay is at fault, you can do the following test. Use a multi meter to measure the voltage on the headlight bulb connector with the bulb removed. You should get something around 12V. Put the bulb back on and measure the voltage again. If you get 0V (or very close to 0V) then it is 99.99% the relay in the CEM that has failed. If you get 0V with the bulb removed, then it is possible that the relay in the CEM is not the problem and instead it is either the headlight switch, or a wiring problem under the radiator or behind the driver’s wing.
If not sure, feel free to contact me and I will see how I can help.
You can follow this guide to remove the CEM
Before you get started, you need to:
Make a note of the anti-theft radio code. Switch off the ignition Disconnect the battery negative lead (not necessary, but Volvo VIDA recommends to do so)
If you do not have the radio code, you can still replace the CEM without disconnecting the battery. I have done it quite a few times and it has never been a problem.
Unclip the small plastic cover with a flat blade screwdriver, and undo the screw hidden behind it. Undo the 3 screws highlighted by the yellow circles.
Raise the plastic cover slightly upwards on the right hand side so it is unhooked and wiggle it out so the left side gets unhooked too. Lower the cover and disconnect the two connectors going to the footwell courtesy light. Remove the plastic cover and the sound insulating cover attached to it.
Undo the two screws securing the CEM.
Wiggle out the CEM and unplug the 4 connectors
Plug in the replacement CEM and put it back in it’s right position. Make sure you line up and slide up the metal bracket to this plastic guiding groove
Unclip the sound insulating cover attached to the plastic cover and put it aside
Place the plastic cover in the footwell and connect the two connectors to the footwell courtesy light. To put the plastic cover back on, you need to start from the left. Make sure the plastic hook and the groove are lined up and slide them in
Then slide the hook on the right side groove and the plastic cover should be all lined up and secured
Screw in the fours screws and put back that small plastic cover on the bottom right screw. And finally, to put the sound insulating cover, slide in the front part to the white plastic groove so it does not fall down. Then raise the rear part, line up the two black clips with the two holes on the plastic cover and push them in until they click.
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Category: Vehicle Parts and Accessories:Car Parts:Other Car Parts
Location: Redhill