Weird electrical problem-headlights

[koit]

Thanks for the info.

I took it in to an auto electrician today and indeed it was the lamps. Both blown......
Seems that it is an inherent porsche scenario that both do go together.

At least it's fixed !

[Burg Boxster]

Originally Posted by koit

Thanks for the info.

I took it in to an auto electrician today and indeed it was the lamps. Both blown......
Seems that it is an inherent porsche scenario that both do go together.

At least it's fixed !

It's not just a Porsche scenario. Think about it for a moment...

- the lamps/bulbs were most likely made around the same time
- they were installed in vehicle at same time
- they run at the same time

Whenever I replace bulbs, especially headlight and brake light bulbs, I just do the pair at the same time. Although they don't usually go bad at the exact same time, I find I'm more often than not replacing the opposite side w/in a week or 2. Having said that, I suspect one side went out and you didn't really notice it until the other side also blew.

In a pinch, if you don't have the litronics, the high,low, and fogs all use H7 bulbs and can easily be replaced yourself. So easy in fact Porsche even gives you directions on how to in the manual as opposed to "See you Authorized Dealer" B.S.

[Lil bastard]

Originally Posted by Burg Boxster

It's not just a Porsche scenario. Think about it for a moment...

- the lamps/bulbs were most likely made around the same time
- they were installed in vehicle at same time
- they run at the same time

Whenever I replace bulbs, especially headlight and brake light bulbs, I just do the pair at the same time. Although they don't usually go bad at the exact same time, I find I'm more often than not replacing the opposite side w/in a week or 2. ...

Yup!! In addition to both bulbs being in service the same amount of time, as a bulb ages it's resistance increases. This is OK because both bulbs on the same circuit are doing this at the same rate.

But, if you replace only a single bulb in the circuit, this new, fresh bulb has much less resistance and so passes more current to it's opposite causing it, in an already 'depleted' state, to 'work' harder and so the second original bulb blows more easily/quickly.