What else is there to the cruise control
 

My cruise doesnt work. So i removed the amplifier, cleaned the pc and resoldered the entire thing. nothing was burned or shorted, and there seemed to be no cold solder or cracked points. but i did it just in case. well cruise is still not working. what else is there that can be a diy job? no blown fuses by the way. is there any way to check the cruise control actuator? if so, what methods. the fsm has nothing on it that i see. any ideas? thanx

If no one beats me to it, at home I have bookmarked one heck of a cruise control troubleshooting article. The link is burried somewhere here in the archives but I have it bookmarked at home but I'm at school now.

Where is the cruise amp for a 1980 240D? It has the vac cannister type of cruise unit.

i dont know about a 240.
EDIT: i see in the fsm cd i have that the 240 is the same as the 300. it has an amplifier by the break pedal mount. as well as the actuator on the inside fender. the diagrams for these two look identical.

now that i have found this, does anyone know the number and location of the brake sensor? its raining right now and i havent been able to locate it under the dash and now half my body is soaked. :confused:

Interesting. Might help.
http://www.peachparts.com/shopforum/diesel-discussion/178676-brake-light-really-problem-cruise-control.html

yes ive been watching that. but unless i have a broken ground from brakes back to the cca....this would not be my problem i would think. because my brake lights work fine. although i do have the 1157 bulbs in them. but when i bought the car, no cruise, and it had bosch bulbs in it. one burned out so i replaced them both with 1157.

Nevermind
 

cruise is working amazingly. i obviously did not get the connector back on completely as it was hanging down when i took a second look. pushed it on nice and tight and its working great.

the sun is out the rain has stopped isnt life grand and retx has cruise

Yahooee. Awsome. Sometimes it's the silly things...

yeah i know, thats a great thing. one thing at a time, is all i can hope for. and here i was thinking it was going to be something more complicated. eh, im not perfect.

Anybody have a pic of the cruise control amp. Is it a big sardine can looking thing?
The 240's have some type of sardine can looking thing mounted to the underside of the driver kick panel. What is that for?

The amp in my 300TD is a metal box that is near the outside wall on driver's side under the kick panel.
Here's what mine looks like.
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1L00T87R020I0O6YUF&year=1982&make=MB&model=300-TDT-001&category=All&part=Cruise+Control+Amplifier

Check your brake lights



in the 300d (w124's atleast) the CC is wired through the same circut as the brake lights.

jimmy, i can take a pic of mine easily if you still need it. its only one bolt holding it in, so i can take it back out no problem. in my 300, it IS a big sardine can looking thing. with the black 8(?) pin block connector at one end of it. the other 4(?) pin connector is connected in line on mine and not part of the can like i believe some others are.
http://www.peachparts.com/shopforum/diesel-discussion/90684-yes-we-have-cruise.html?highlight=cruise+control+amp
post 15 has a pic of one. mine has black plastic rather than the beige.

That W126 amp seems to have more pins, but I get the idea. Guess I will go see what my 300D has. With not dash or seats it is easy to get around in....:o