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Ron, ASE Certified Technician
Category: Australia Car
Satisfied Customers: 35857
Experience:  ASE Certified Tech
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I am having issues with my rear brake lights, 3 red light is

Customer Question

Hi, I am having issues with my rear brake lights, 3 red light is working and I am trying to locate the relay to swap it with the fog relay , is this possible to do
Submitted: 1 year ago.
Category: Australia Car
Customer: replied 1 year ago.
Volvo XC90 2003 model
Customer: replied 1 year ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer: replied 1 year ago.
Hi , can I also get an idea how long a response will be thanks ?
Expert:  Ron replied 1 year ago.

Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.

The problem you are describing can be caused by any of the following,

  • Brake Lamp Relay
  • Brake Light Bulbs
  • Brake Light Shunt
  • Rear Electronic Module (REM)

    In order to determine the cause you are going to need to do some testing. I have enclosed the steps in the link below. Copy and paste the link to your browser to open and view the steps.
Customer: replied 1 year ago.
Hi, the rear rem is the black square things near the fuses right?What numbers should be the brake one and rear fog one?
Expert:  Ron replied 1 year ago.

Yes and they panel should be marked as per the steps I sent you .

Customer: replied 1 year ago.
Hi Ron,The car is a Volvo XC90 and I can't seem to find the descriptions you mention - there is an MI15 , 16 etc and they are larger black square boxes on the right side of the fuses .
Customer: replied 1 year ago.
I think the RMI5 refers to a different model.