QuestionMy '99 V70 has, what seems to be, a Temperature related Lighting problem. This car has about 90K Miles on it.
Once the temperature gets into the 40's (Fahrenheit) or below, the Headlights, Dash Lights, Back-up Lights, Turn Signals, Electric Rear Defroster, Seat Belt Warning Lights, Mirror Heaters and possibly other items that I'm not aware of, will not come on immediately after starting the car. They will eventually come on.
The colder it is, the longer it takes for them to come on. It may take up to 5 or 6 minutes (so far) before they come on. Once they turn on, they work flawlessly for the rest of the trip.
Wiggling the Key Switch makes no difference. Driving through potholes makes no difference. Wetness makes no difference. Removing the Battery for 5 minutes makes no difference.
The High Beams / Exterior Courtesy Lights Switch will light the Headlights as long as it is held. Park Lights will work when selected, and will light the Dash Lights. The Radio and A/C System are working fine.
I tested Voltages at Fuse Box on Cable stud.
Before starting, key OFF: 12.07
Before starting, key ON: 12.07
During starting: 10.40 (I think this is normal)
During problem: 13.65 - 13.67
After lights begin working: 13.67 and rising very slowly
I suspect that some "Module" is malfunctioning until the Electricity fed through it heats it up enough to begin working. I hope I'm wrong.
I'm really hoping that someone can check a Schematic and find the point(s) that are common for these Systems and can tell me physically where these points are.
Thanks in advance.
AnswerRob, as far as the headlights, replace the switch. Common problem on these. You suspicions are correct. There is an issue with the module but to be sure, a scan of the system with the Volvo VADIS system is in order. Check all your ground points as well. Roger
