Circuit/System Testing
WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect each KR20 cooling fan relay one at a time in the order listed below.
- KR20F cooling fan relay
- KR20B cooling fan low speed relay
- KR20A cooling fan medium speed relay
- KR20D cooling fan high speed relay
- Ignition ON, observe that the fan is not activated after each relay is removed.
- If the fan is not activated, replace the appropriate KR20 relay.
- If the fan is activated, test the appropriate relay controlled output circuit for a short to voltage.
NOTE:
The following tests must be performed on each cooling fan relay.