We have a 2018 Apollo Coromal van with the solid panel construction. So far very happy with it. However, now the tail lights have stopped working. I disconnected the tail light wire at the plug top and took a reading with a multimeter. It was showing zero. I briefly attached a fly lead from a battery and nothing changed. I noticed a decent spark when I disconnected. I suspect a short somewhere. I am hoping it is in one of the lights and not in the wiring as it would be near impossible to access. Has anyone had a problem like this? Do these marker lights and tail lights short out? I suspect that as the van is not very old that they are led lights. I am thinking of gradually removing lights and isolating sections of the circuit until I find the faulty light or loop. Any thoughts? cheers. Peter
Dick0 said
11:29 AM Jun 2, 2023
Petemox wrote:
Hi
We have a 2018 Apollo Coromal van with the solid panel construction. So far very happy with it. However, now the tail lights have stopped working. I disconnected the tail light wire at the plug top and took a reading with a multimeter. It was showing zero. I briefly attached a fly lead from a battery and nothing changed. I noticed a decent spark when I disconnected. I suspect a short somewhere. I am hoping it is in one of the lights and not in the wiring as it would be near impossible to access. Has anyone had a problem like this? Do these marker lights and tail lights short out? I suspect that as the van is not very old that they are led lights. I am thinking of gradually removing lights and isolating sections of the circuit until I find the faulty light or loop. Any thoughts? cheers. Peter
I had a similar problem. All my lights and markers are led. One of the tail lights had shorted out the internal light control board and affected the whole tail light circuit.
Another time it was the cause of a corroded van plug contact.
Petemox said
07:39 PM Jun 2, 2023
Thanks Richard. I cant see what you van is from your profile photo but I can tell it isnt the same as ours. I doubt we have a light control board as I have traced wiring beneath the van and the rear taillights run directly from the plug top. However, I do appreciate your reply and I will have to start disconnecting lights and checking them for shorts. cheers. Peter.
jegog said
12:29 PM Jun 3, 2023
Zero ohms indicates a short circuit. Normally multimeters use a low voltage to measure resistance which is too low to turn the LED on. Remove all the lights and then measure the resistance again and if it is now open circuit replace the globes one by one. If still a short circuit, check the wiring. Have fun.
Dick0 said
12:20 PM Jun 4, 2023
Petemox wrote:
Thanks Richard. I cant see what you van is from your profile photo but I can tell it isnt the same as ours. I doubt we have a light control board as I have traced wiring beneath the van and the rear taillights run directly from the plug top. However, I do appreciate your reply and I will have to start disconnecting lights and checking them for shorts. cheers. Peter.
FYI Peter
Every led lamp has a control board (usually a small printed circuit board) integrated into the lamp.
Petemox said
07:39 PM Jun 4, 2023
Thanks Richard. I wasnt aware of that. cheers.
Petemox said
07:40 PM Jun 4, 2023
jegog wrote:
Zero ohms indicates a short circuit. Normally multimeters use a low voltage to measure resistance which is too low to turn the LED on. Remove all the lights and then measure the resistance again and if it is now open circuit replace the globes one by one. If still a short circuit, check the wiring. Have fun.
Hi
We have a 2018 Apollo Coromal van with the solid panel construction. So far very happy with it. However, now the tail lights have stopped working. I disconnected the tail light wire at the plug top and took a reading with a multimeter. It was showing zero. I briefly attached a fly lead from a battery and nothing changed. I noticed a decent spark when I disconnected. I suspect a short somewhere. I am hoping it is in one of the lights and not in the wiring as it would be near impossible to access. Has anyone had a problem like this? Do these marker lights and tail lights short out? I suspect that as the van is not very old that they are led lights. I am thinking of gradually removing lights and isolating sections of the circuit until I find the faulty light or loop. Any thoughts? cheers. Peter
I had a similar problem. All my lights and markers are led. One of the tail lights had shorted out the internal light control board and affected the whole tail light circuit.
Another time it was the cause of a corroded van plug contact.
FYI Peter
Every led lamp has a control board (usually a small printed circuit board) integrated into the lamp.
Thanks. Looks like that is the way to go. cheers.