very odd problem
 

hi guys. i recently installed a new temp gauge on 86 w124. the old one had a 4 prong connctor and the new one had 5. so i cut off the plug in the car and directly spliced the wires into each of the prongs. the temp gauge works great, but when i turn on the headlights, it shuts off. what's up with that? thanks

You need to re-wire to this bulletin...

look at this post... http://www.peachparts.com/shopforum/tech-help/159734-lcd-temp-display-question.html

yeah i did exactly that, but the temp display still turns off when i turn the headlights on. its so odd.