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Subject Topic: Tailboard electrics Post Reply Post New Topic
Personhappycamper888
05/4/2024 at 9:35pm
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Was given a pre-wired tailboard with a 7-pin plug to use on motorhome when carrying bikes at night. Checked it out with and old leisure battery and everything did what it was supposed to. Purchased a prewired 7-pin socket and installed at back of motorhome - Hymer b534 2013 - intending to splice the wires into the rear lights. When I did a dry run the appropriate tail board light would flash briefly and the van light would go out. Disconnect and turn off ignition. Van light comes on fine.
I’m assuming that trying to light two bulbs (van plus tailboard) confuses it. Would it work if the tailboard had leds?
Or any other answer or suggestion appreciated.
Thanks


Personbirdman101
via mobile 05/4/2024 at 9:58pm
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You need a bypass unit or dedicated wiring loom for your motor. With modern CANBUS wiring system,gone is the days when you just spliced in.

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2023 Swift Archway Woodford, MK3 Kuga ST Line X 190 ps AWD Auto
Now 52 years Caravanning completed.


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PersonErnie DB
07/4/2024 at 10:52am
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This may be a simple solution to your problem. Similar units may be available from other suppliers.
https://hanfordtrailers.com/towbar-electrics-7-way-bypass-relay-for-canbus-multipl........

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Never argue with fools........They drag you down to their level, then beat you with experience.


Person664DaveS
via mobile 07/4/2024 at 2:08pm
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Don't splice in. Canbus systems are not designed for that. It can cause all sorts of issues.

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DS-There's more to life than football!!!


Personhappycamper888
07/4/2024 at 4:34pm
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Enormous thanks to birdman101, Ernie DB and 664DaveS for your valuable and prompt advice. I have discovered over the years that anything you do will always require the purchase of something else - especially if you were given the first bit free!
I have ordered the relay and will post news of my success or an appeal for further help!!


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PersonBernie47
07/4/2024 at 4:38pm
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Quote: Originally posted by happycamper888 on 05/4/2024
Was given a pre-wired tailboard with a 7-pin plug to use on motorhome when carrying bikes at night.


Lights and number plate need to be visible at all times to comply with the law, not just at night.

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Bernie


Personhappycamper888
via mobile 07/4/2024 at 8:02pm
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Thanks Bernie47.
All van lights are visible day and night but thought I would utilise the 'free' tailboard for use when the bikes on the rear rack are covered.



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