Sova Chat Thread ver. II
Cory, I assume you'll start placing some trendy stickers on the windshield? Possibly some fatlace and canibeat stickers?
Kidding, those are gonna look great. Chad had LM20s, right?
Kidding, those are gonna look great. Chad had LM20s, right?
completely understand.
I'm having headlight issues in my daily. Volvo couldn't have just had a normal headlight relay. They just had to make it part of a $500 control module
Still looking for ways to get around it.
I'm having headlight issues in my daily. Volvo couldn't have just had a normal headlight relay. They just had to make it part of a $500 control module
Still looking for ways to get around it.
1. Check fuses 11A/9 (Left side) or 11A/10 (Right side).
2. Check the bulb. Check for power at terminal 2 at the headlight assembly (Blue/Red - Right side) or (Blue/White - Left side).
3. Disconnect the Central Electronic Module (CEM) and jumper F3 to F4 and verify left low beam is operating. Jumper F13 to F12 to verify the right low beam is operating.
4. If all checks are good, replace the CEM.
2. Check the bulb. Check for power at terminal 2 at the headlight assembly (Blue/Red - Right side) or (Blue/White - Left side).
3. Disconnect the Central Electronic Module (CEM) and jumper F3 to F4 and verify left low beam is operating. Jumper F13 to F12 to verify the right low beam is operating.
4. If all checks are good, replace the CEM.
or...
1. At the headlamp switch, check terminal 9 (Violet wire) for 10V in position 2 and 0V in position 0.
2. Check terminal 13 (Gray/Red wire) for 10v in position 0 and 0V in position 2.
3. Check terminal 5 (Black wire) for a good ground.
4. If there is a good ground, but the ref voltage is not being switched correctly, replace the headlamp switch.
5. If the switch is working correctly, voltage drop the Central Electronic Module (CEM) internal headlamp relay by checking between terminals F3 (Yellow/White) and F4 (Blue/White). Also check between terminals F13 (Yellow/Red) and F12 (Blue/Red). If there is excessive voltage drop, replace the CEM.
A scan tool that can access the CEM can access live data to check the headlamp switch. Volvo's information shows 4.5V as the ref voltage from the CEM to the headlamp switch, but testing has shown that to be 10V.
1. At the headlamp switch, check terminal 9 (Violet wire) for 10V in position 2 and 0V in position 0.
2. Check terminal 13 (Gray/Red wire) for 10v in position 0 and 0V in position 2.
3. Check terminal 5 (Black wire) for a good ground.
4. If there is a good ground, but the ref voltage is not being switched correctly, replace the headlamp switch.
5. If the switch is working correctly, voltage drop the Central Electronic Module (CEM) internal headlamp relay by checking between terminals F3 (Yellow/White) and F4 (Blue/White). Also check between terminals F13 (Yellow/Red) and F12 (Blue/Red). If there is excessive voltage drop, replace the CEM.
A scan tool that can access the CEM can access live data to check the headlamp switch. Volvo's information shows 4.5V as the ref voltage from the CEM to the headlamp switch, but testing has shown that to be 10V.
The bulb is definitely good as well as the wiring inside the headlight assembly. Fuses are good. This is only a problem with the driver side headlight. Passenger side works as it should. One other odd thing is it will sporadically come back on and work for a little before going out. Looked at it last night for a while to check the obvious things and couldn't fix it. When I turned the car on this morning to come to work it was working. By the time I made it to work it stopped working again.
I'm pretty sure it's the CEM but I'll look at some of the other things you mentioned. I got a buddy that's good with the electronics on cars and troubleshooting odd issues.
I'm pretty sure it's the CEM but I'll look at some of the other things you mentioned. I got a buddy that's good with the electronics on cars and troubleshooting odd issues.




