Component Testing

Relay Test

1. Ignition OFF, disconnect the KKR4B Outside Rearview Mirror Heater Relay.
2. Test for 60-180 Ω between terminals 85 and 86.
   • If less than 60 Ω or greater than 180 Ω 

     Replace the KR4B Outside Rearview Mirror Heater Relay.

   • Go to next step: If between 60-180 Ω 
3. Test for infinite resistance between the terminals listed below:
   • 30 and 86
   • 30 and 87
   • 30 and 85
   • 85 and 87
   • If less than infinite resistance 

     Replace the KR4B Outside Rearview Mirror Heater Relay.

   • Go to next step: If infinite resistance 
4. Install a 3 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground.
5. Test for less than 2 Ω between terminals 30 and 87.
   • If 2 Ω or greater 

     Replace the KR4B Outside Rearview Mirror Heater Relay.

   • Go to next step: If less than 2 Ω 
6. All OK