Author Topic: How to test fan relay on K1100LT with black fan relay (not standard white relay)  (Read 2942 times)

Offline obsessed

  • Motobrick Curious
  • Posts: 12
Working on a 1995 K1100LT in Washington State.


I am unable to test the fan relay as described at http://www.ibmwr.org/ktech/fan-diagnosis.shtml as this bike does not have the white fan relay box.    Anyone here know how to do test the fan on this bike?   My internet searches have been unsuccessful.  I believe the fan relay is the second little box down on the left (see attached photo).

Thanks.
  • Washington State
  • 1991 K75RT
"Faster, Faster, until the thrill of speed overcomes the fear of death."

Offline rbm

  • ^ Quintessential Motobricker
  • Posts: 2281
from http://www.k11og.org/forum/viewtopic.php?t=2110:

There is a black 3 pin diagnostic connector on the left side of the bike above and to the left of the battery, you will need to remove the side cover to gain access. This connector will have a blue plastic weather protector connected to the open end. Pin #1 will have two Brown/Black wires, Pin #2 will have one Brown/White wire and Pin #3 one Brown/Green wire. Here are the pin functions for this diagnostic connector.

Pin1: Motronic Diagnostic Fault Code Read-Out and Fan Test Activation
Pin2: ABS Diagnostic Fault Code Read-Out and RESET
Pin3: Motronic Diagnostic Activation of the Throttle Position Sensor Test.


To test the fan circuits, Ignition ON, Engine OFF, ground pin #1 for 10 seconds. The fan will cycle intermittently and the temperature warning lamp (or the Test LED, if connected) will flash 3333.
This indicates that the fan test is in progress. This test will continue to run until the ignition is switched off.


NOTE: Fan Test for Motronic 2.2
John from Down Under adds this:


"Fan Test works on Motronics 2.2"


1. Ignition must be OFF
2. Ground Pin 1
3. Turn ignition ON
4. Count to ten (1 Mississippi, 2 Mississippi,...........)
5. Unground Pin 1
6. Fan will intermittently run until ignition is turned off
  • Regards, Robert
Toronto, Ontario

1987 K75 - Build Blog @http://k75retro.blogspot.ca/

Offline obsessed

  • Motobrick Curious
  • Posts: 12
Thank you, rbm!
  • Washington State
  • 1991 K75RT
"Faster, Faster, until the thrill of speed overcomes the fear of death."

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