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Towing and Caravan Topics A forum for all towing/caravanning related topics |
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Trailer brake light warningViews : 2129 Replies : 9Users Viewing This Thread : |
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Aug 7th, 2020, 21:16 | #1 |
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Last Online: Oct 3rd, 2022 18:47
Join Date: Dec 2013
Location: Hebden Bridge
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Trailer brake light warning
When I hook up my trailer to my factory fitted retractable towbar (V90) I get as warning that the trailer brake lights are not working, but they are!
Any easy fix?
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V90 D4 MY2019 savile grey with winter pack |
Aug 9th, 2020, 10:53 | #2 |
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Last Online: Apr 22nd, 2024 06:42
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Location: Blackpool
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Hello are your trailer lights LED ? , if so the car will not detect a high enough current draw & trigger a false error message . Also try connecting to another trailer / caravan & see if that remedies the issue .
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Aug 11th, 2020, 13:25 | #3 |
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Last Online: Mar 17th, 2022 10:41
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Location: Wishaw Lanarkshire
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Brake Lights
I would point out that i have the Volvo ECU in my car and have no issues with any lights the caravan is a 2 year old Swift Elegance all round LEDS. I would suggest there is a fault in the system.
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Aug 11th, 2020, 17:18 | #4 | |
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Last Online: Apr 11th, 2024 09:21
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Location: Ffos y Ffin
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Quote:
If all lights are led get hold of, beg borrow or steal, a trailer board with filament bulbs and try that, if the system now works you need resistors in series with the led lamps to increase the current draw. I keep a known working trailer board carefully stored in the attic for just such testing. It is far easier to remove bulbs from a trailer board to enature failer warnings are working as they should than potch about with the caravans. Paul. |
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Aug 11th, 2020, 20:55 | #5 | |
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Location: Plymouth
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Hi
Quote:
Iain |
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Aug 12th, 2020, 16:45 | #6 | |
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Last Online: Apr 11th, 2024 09:21
Join Date: Nov 2012
Location: Ffos y Ffin
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Quote:
21w/12v= just shy of 2A circuit current. A lot of led lamps will not stand that current through them so connecting a resistor in parallel so that it shunts the led lamps but gives a circuit current of 2A will work. Problem is the current will try to take the path of least resistance so the led lamps may suffer either way. I have never measured the resistance of an led, reverse polarity they are open circuit correct polarity no idea. Paul. |
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