Component Testing

Rear View Mirror Heater Relay Test

1. Vehicle OFF, disconnect the KR4B outside rear view 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 rear view mirror heater relay.

   • 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 rear view mirror heater relay.

   • 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 rear view mirror heater relay.

   • If less than 2 Ω 
6. All OK

Rear Defogger Relay Test

1. Vehicle OFF, disconnect the KR5 rear defogger relay.
2. Test for 60-200 Ω between terminals 41 and 40.
   • If less than 60 Ω or greater than 200 Ω 

     Replace the KR5 rear defogger relay.

   • If between 60-200 Ω 
3. Test for infinite resistance between the terminals listed below:
   • 41 and 43
   • 41 and 42
   • 40 and 43
   • 40 and 42
   • If less than infinite resistance 

     Replace the KR5 rear defogger relay.

   • If infinite resistance 
4. Install a 3 A fused jumper wire between relay terminal 41 and 12 V. Install a jumper wire between relay terminal 40 and ground.
5. Test for less than 2 Ω between terminals 43 and 42.
   • If 2 Ω or greater 

     Replace the KR5 rear defogger relay.

   • If less than 2 Ω 
6. All OK