Hi guys , I keep getting the blown bulb warning on my dash along with check rear left side light and check rear right side light. I have checked the bulbs and they are good and I even replaced all of them but I still get the same messages.  Has anyone had this issue and any idea how to sort it. Thanks in advance.

Did you also check and replace the w3w bulbs in the rear lights?

Yeah I replaced all the bulbs over the space of about two weeks and to look at them now they are all working fine but the warning still comes on.

Do you have a towbar fitted? Mine came on and it was to do with the bypass relay wiring unit. I also have the same problem with  the high level brake light as its an aftermarket one and must be slightly different wattage. It could also be a bad contact. Enough to light bulb but confusing the system. Check theres no corosion etc.

Alasdair

Edited 17 February, 20251 yr by Alasdair1

Yes I have a tow bar. I didn't think of that , would that not just be connected to one side ? Or would it effect both?

42 minutes ago, Sstuart said:

Yes I have a tow bar. I didn't think of that , would that not just be connected to one side ? Or would it effect both?

Not sure. I used a bypass kit on mine. It uses one brake but L and R side lights 

May not be the unit but if you have one fitted check the fuse for the supply. You could always disconnect unit to see if its causing the fault but as said could also be poor earths or dirty contacts for bulbs. On a random occasion I have had bulbs still work but still puts on bulb failure light. They were cheap bulbs I picked up somewwhere. I assume a bad connection or poor earth would change the resistance/current and trigger blown bulb warning.

Alasdair

 

Thanks for the reply I'll have a look when I'm home and see if i can sort it.

I had something similar.  The bulb warning kept coming on even after checking all bulbs and replacing one, it was just a loose wire/connexion in the end.

Yeah there is definitely something not quite right back there because my back wiper decides it doesn't want to work sometimes .

1 hour ago, Sstuart said:

Yeah there is definitely something not quite right back there because my back wiper decides it doesn't want to work sometimes .

Mine does the same but its the motor thats seizing. Check the earths and contacts