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Discussion Starter · #1 ·
Hello all,

I own a 2003 Volvo S60 that's been displaying message "check stop lamp" whenever I hit my brakes. My right and left brake lights won't turn on but my top brake light is fine. So far, I've changed the bulbs, tested the relay by swapping it with another, and tested the shunt by swapping it with another, but no luck. Is there anything else I can try at home before I have to take it to a mechanic?

Thank you in advance.
 

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There is an electronic module in the trunk that controls the lights in the back end of the vehicle. In my 2005, this module is located in the left rear quarter panel, & it can be accessed from the trunk. You might want to visually inspect this module, and the connections to the module. It might help to unplug and plug in any connectors that carry current to the brake lights. You might have oxidized connectors, and the action of unplug/plug in would likely remove some of the oxides. It might help to check the voltage at the main battery, and re-charge if needed. At the front end of the car, there is a fuse box, and these fuses can also be oxidized. I would consider buying a new set of fuses and replacing every one.
 

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Also, wiggle your bulbs while someone is pressing the brake pedal and see if they light up. On my 01 S60, the bulbs were loose in the socket and not always making a connection. I pushed in a 1/2" long strip of 14 gauge solid copper wire so the bulb sits securely in the socket. Haven't had a problem for 2 months now
 

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Your welcome. Again, very common problem. When bulbs arent the issue, start here. tbh, I think we've seen this issue more than a brake light switch failure.
 

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Discussion Starter · #7 ·
Check this out https://www.volvoxc.com/0/resources/how-to/pdf/recall-brake-light-relay-replacement.pdf

Very common problem...Even if your vehicle does not fit the recall years, if it has the one single relay, update this first before moving any further.

The recall pertains to V70. But S60's and 80's have the same issues at some point. We've fixed hundreds of them..
So I should replace two relays? The brake light relay and the fog light relay? Where is that relay located on the S60? Thank you!
 

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Not sure whether or not you need to replace both. But they should both be located on the drivers side of the trunk rear panel. There is a knob to twist and pull the panel down. You will see a bunch of relays, google the schematic for specific relay locations
 

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If you click on that link it will show you EXACTLY what to replace and give part #'s. Per the bulletin you remove 1 single relay and replace it with TWO in its place :)
 

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Discussion Starter · #10 ·
If you click on that link it will show you EXACTLY what to replace and give part #'s. Per the bulletin you remove 1 single relay and replace it with TWO in its place <img src="http://www.vwvortex.com/Anthony/Smilies/smile.gif" border="0" alt="" title="Smile" class="inlineimg" />
Oh okay, I see. My Volvo S60 has only one small relay in the RMI5 position, nothing in RMI6, so I’m not sure this will work for me.
 

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Put one in the other slot and give it a go :). the other position is fog lights but if yours doesnt have them it explains it. and you tried that relay already?
 

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Discussion Starter · #12 ·
Put one in the other slot and give it a go :). the other position is fog lights but if yours doesnt have them it explains it. and you tried that relay already?
So I put two new relays in RMI5 and RMI6 and still no luck. Which relay is the fog light relay on the S60? I'm having trouble finding a relay diagram for the car. Thanks for your help so far!
 

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Discussion Starter · #14 ·
Since swapping the relays and shunts didn’t fix the problem, and since the fuses are fine, and the bulbs are correct, is it time to assume there’s a wiring problem? BOTH of my brake lights are out and they went out at the same time. I’m at a loss of what else to so and don’t want to pay a hefty mechanic fee but if that’s what it takes then I’ll go.
 
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