Cruise Control not working

darylrobert · Post by **darylrobert** » 01 Sep 2012, 05:56

So 3 years after doing a Auto to Manual (standard) tranny i am looking at getting the cruise control working again, it worked well before but after removing wire 3T from the relay it still doesnt work...?? anyone know its a 1998 V70 T5

http://www.volvoforums.org.uk/showthread.php?t=71697

darylrobert · Post by **darylrobert** » 02 Sep 2012, 04:32

does anyone know what im missing?...

madspeed50 · Post by **madspeed50** » 02 Sep 2012, 08:39

vacuum lines all check out?

Sent from my rooted, rommed Galaxy Nexus....

Post by **erikv11** » 02 Sep 2012, 10:22

Yeah you must start by testing the vacuum lines, most common problem is the rubber elbow under the battery tray rots out. Or it could be the brake switch, etc.

There is a great troubleshooting guide in the Volvo manual, to systematically test each component. It is a 95 manual so you can't run the OBD1 tests, but otherwise will be totally accurate for your 98 (e.g. jumper tests for the relay and the pump), download it from here:

https://www.matthewsvolvosite.com/downlo ... vo_850.zip

Once you unzip it see the file called cruise control system.pdf, it instructs the tests.

darylrobert · Post by **darylrobert** » 05 Sep 2012, 01:05

All fixed, thanks guys.

the brake switch wasnt working, took it apart and cleaned the contacts.