Outermost rear tail light bulb question
 

Hi,

Well, my car just made a 2500 mile trip to Florida and back. Ran real well, except one of the tanks on the return, when I only got 23 MPG (the diesel that came out didnt foam up at all, and I suspect it was bad fuel).

Anyhow, I noticed that the outermost light on the taillight assembly is out on one side. This is the far outer light, that kind of wraps around the car at the outer edge of the tailight assembly.

I do not have any information as to what the correct bulb is for that location. Fastlane lists a lot of light bulbs, but doesnt really specify location. I assume it is a small bulb, as it isnt very bright and is a very small portion of the taillight.

Also, all I see for sale on fastlane are osram/sylvania bulbs. When doing a search about the bulb I want, I noticed that people mentioned that non-bosch bulbs in the taillights can fry the cruise amp. I want to be sure that I use bosch bulbs, unless the osram/sylvania ones that are Ni plated on the base are OK for my cruise amp, in which case Ill buy them and swap them in.

Thanks for the help,

JMH

Funny you ask. I just replaced my left outermost bulb in my W123 tail assembly two weeks ago. I used the Sylvania 3893 bulb, which was also labeled (T4W). It is for European cars and indicates it is for marking lights, etc. I have driven with the lights on about 5 times, each for at least a half hour and nothing has burned out. I’d be quite surprised if such a small bulb gave you a problem.

The cruise control blowing up with a non German bulb is an old wives tale. That said I do use German bulbs because I think they are MUCH higher quality than OEM American bulbs.

BTW I think I have an old W123 instrument cluster if you want to swap the fuel gage out to see if it stops your flickering problem.

Let me know if you want to give it a try.

Tim

JHZRs,

Using only German bulbs is like saying don't replace your German battery with a USA battery because you are contaminating the German electrons.

The marker light you mentioned has no effect on the cruise control amplifier (CCA). Its the brake circuit that is connected to the CCA.

P E H