Announcement

Collapse
No announcement yet.

Radiator Fan Issues - Running on ignition - Help

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • #16
    Originally posted by S2central.net View Post
    If you pull relays 3 or 11 (in the main fusebox) it should help trace the fault down.
    With both relays out and the fan still runs then you are looking at J135 or J155 misbehaving (or a wiring fault).
    If 3 is out it stops - Had to do that to see if after run pump was working (for 5 secs) on ignition (couldn't hear with fan going), and to use vagcom without the fan running! Ill do some other check tomorrow after work.

    Comment


    • #17
      Couple of easy things to do then - Relay 3 is Speed 1 (slowest) so its looped into the after-run circuit with J155 etc

      1. Swap relays 3 & 11 over to rule out possibility of relay 3 contacts being mechanically stuck ON
      2. Unplug J155 (after-run relay in the aux panel above driver pedals at position 14 - does that stop the fan running ?
      3. Assuming J155 removal stops the fan operation... plug it back in, then unplug the thermal switch (F98) on the water rail - does that stop the fan operation ?

      I know its tricky getting access to F98, but with care and some luck you should be able to slide one of the two spade terminals off the switch - thats enough to disconnect it. As an alternative, if you know how to extract the relevant pin (temporarily) from T8f then you can do it that way.
      Last edited by S2central.net; 9th July 2018, 23:05.
      Paul Nugent
      Webmaster http://S2central.net
      Administrator http://S2forum.com

      1994 S2 Coupe ABY - aka Project Lazarus
      2001 A6 allroad 2.5TDi - family tank
      2003 S4 Avant 4.2 V8 - daily burble

      Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

      There are only 10 kinds of people that understand binary - those that do, and those that don't

      Comment

      Working...
      X