VOLVO 2004 AND LOWER
CEM Communication Tips
Follow these steps to save yourself a lot of time and headaches. This is more of a #lifehack than a #techtip!
Before disassembling your CEM, make sure to take a photo of all your relays and shunts intact, prior to sending your unit in for repairs. This makes it easier when it comes time to install your unit back into your vehicle. You now have a visual representation and this ensures that the relays and shunts will go back to their correct positions.