Seems nobody responded in this post to "J.HIDALGO's" mention about wrong bulbs causing the cruise control to malfunction!

I have also read where this situation may effect the cruise.

Before ever driving my 87 300DT, I installed red led stops in the vacant spot in the taillight assembly. Since I put it on the road, my cruise has never worked! I read a thread about soldering corroded contacts in the cruise amp and thought I'd pull it out and have a look. In my attempt to pull it out from under the dash, I snapped the circuit board in half! There appeared to be no corrosion and nothing wrong with the amp before I broke it! then I read about having wrong bulb, non MB specified bulbs that is, and is to late for me to find out unless I want to spend $300 for a new amp, only to find out that it was the red led's that may have caused the cruise to not work!

Any input on this possible subject?