Exterior Light failure 560SL

[Softball60]

I have a situation and am looking for ideas on how to correct.

My exterior failure light in the dash goes on everytime I start the car and hit the brake pedal the first time. It stays on till I shut the egnition off.

I believe it has impacted my cruise control!!

I have replaced all of the rear bulbs to Sylvania Osram.

Your ideas are appreciated

Thanks

[tecqboy]

Possible faulty brake pedal switch?

[Softball60]

Techboy,

Thanks for the reply.

If the brake light switch is bad, would the brake lights still work?

Thanks

Paul

[tecqboy]

If the brake lights come on full bright, then the switch is probably OK.

[Softball60]

It really has me puzzled. The brake lights seem to be full on!!

Doesn't anyone else have any idea's. I thought this site was for helping each other.

This really has me puzzled. I do believe it is affecting my cruise control??

Thanks

[Tom McMenamin]

Many times the little box on the top of the trunk bulb burns out and causes the bulb failure light to come on when you hit the brakes. That idiot light comes on wheneverany bulb goes out. Check the trunk top light

[Softball60]

Thanks but that light is also working!!

[Walrus]

Double-check the wattage of the replacement bulbs... If in doubt, replace with EXACT original wattage/type. That little monitor is sensitive to current changes.

...and chill out... Your comment about this site helping others is correct, but you get what you pay for. After all, what was your price of admission here?

[Softball60]

Walrus,

Nothing derogatory was meant by my comment. It was to ignite some of the great thinking and passion I have seen on some of the discussions with this group.

All of the bulbs were replaced with new Osram's. Maybe I will have to get the originals....Bosch?......

Thanks

[Tom McMenamin]

The number 5 fuse controls the stop signal and the cruise control. I also controls the tach and the instrument cluster. Just for giggles replace the #5 fuse (white 8 Amp) fuse and see if it makes a difference?

I have 300plus posts on here and sometimes folks just do not know the answer. If thats the case your post will go unanswered.

The 560SL has quirks. A fuse change as I mentioned coulf fix your problem sounds ridiculous but the 5 fuse does affect the cruise control and the brake light. Who knows gofigure.

You are narrowing it down. it sounds to me you are either at a faulty light on dash or the fuse and bulb control is screwed up.

I blew a Fog Light last winter and replaced it this Spring and the dash light stayed on. I checked and the low beam was out. Replaced the low beam and found the fuse was replaced by an 8 Amp and it should have been a 16A works fine but also found out that I had two tail lights out and
I am still searching. There is something to using Mercedes Bulbs. I'm living proof but it only hold true for certain bulbs. Again, go figure!

Let me know what happens.

Last thing... Search the site for brake light controls, idiot light control on dash. See who answers these questions most often and write that person for direct help.

Hope this helps!

[Softball60]

Tom,

Thanks for the information. Car is currently over at a friends on the rack. Am installing new fuel pumps and gas tank drain line hose!!

Softball60/Paul