Component Testing

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF, disconnect the KR20 cooling fan relay.
Test for 70-110 Ω between terminals 85 and 86.
- If not within the specified range, replace the KR20 cooling fan relay.
Measure the resistance between the terminals listed below. The DMM should display OL.
- 30 and 86
- 30 and 87
- 30 and 85
- 85 and 87
  - If less than the specified range, replace the KR20 cooling fan relay.
Test the KR20E relay for less than 2 Ω between terminals 30 and 87A.
- If greater than the specified range, replace the KR20E cooling fan relay.
Connect a 20 A fused jumper wire between relay terminal 85 and B+. Connect a jumper wire between relay terminal 86 and ground. Test for less than 2 Ω between terminals 30 and 87.
- If greater than the specified range, replace the KR20 cooling fan relay.

G10L and G10R Engine Cooling Fan

Ignition OFF, disconnect the harness connector at the G10 engine cooling fan assembly.
Connect a jumper wire between ground and the G10 ground circuit terminal 2.
Connect an appropriately fused jumper wire between B+ and the G10 B+ supply circuit terminal 1. The cooling fan should operate at a High speed:
- If the cooling fan does operate, replace the G10 engine cooling fan.