Cruise Control won't engage - Troubleshooting - VWDiesel.net The IDI, TDI, and mTDI source.

• Cruise Control won't engage by catlin_cava on 09 Apr, 2009 08:37
• I have a 1.9AAZ in a 97 MK3 5speed. and the Cruise control won't engage.
• #1 by Vincent Waldon on 09 Apr, 2009 09:15
• MK3 cruise controls are famous for being persnickety... here's the best troubleshooting guide I've found so far:
  
  http://forums.vwvortex.com/zerothread?id=983344
• #2 by ein bora on 18 Apr, 2009 06:45
• Vince is right - that is the best test to pin point what is wrong with the cruise control system. In my case it ended up being the controller, I farted around with it trying to repair possible problems, i.e. the relay, cold solder joints stuff like that. Finally I found a rebuild site - www.autoecu.com  on e-bay of all places and sent mine away for rebuild. Excellent service and my cruise finally works, and works perfectly every time.
  I had thought about buying a used one but as Vince mentioned the mk3 cruise modules are well known for there short comings and I didn't want to risk it. I highly recommend this service for the serious cruise control addict.