Reply With QuoteSounds like either a diode has failed (if they did common earth) or they wired incorrectly on the resistor pack.
YarnMaster
Weird Trailer Wiring
Considering the various wiring bits were done by 3 separate electricians, guess I should have expected something like this - maybe Tim @ Traxide has a logical answer/explanation?
1 - about a year ago after purchase, had connections fitted including ESC to the D4, to enable towing the van.
2 - just recently, had resistors added so the car would recognise the van with its all LED lights arrangement.
Pre last trip, I was travelling home after picking up the van from storage, and a kind motorist told me that both L & R indicators came on when I indicated to turn left (I won't know about right turns until I check later today, because I forgot to check at the time after resolving the initial problem as below).
I then turned on the forgotten to do "in car" over-ride switch to activate the resistors and bingo all is well/indicators working perfectly - (all of my towed bits are now LED lights, hence the in car switched resistors approach, with still the ability to tow non LED by switching off the resistors).
I doubt the "all indicators on" scenario is intended to occur when the LED control switch is in the off position, so presumably there must be a wiring error somewhere?
D4 MY16 TDV6 - Cambo towing magic, Traxide Batteries, X Lifter, GAP ID Tool, Snorkel, Mitch Hitch, Clearview Mirrors, F&R Dashcams, CB
RRC MY95 LSE Vogue Softdash "Bessie" with MY99 TD5 and 4HP24 transplants
SADLY SOLD MY04 D2a TD5 auto and MY10 D4 2.7 both with lots of goodies
OldBushie
Sounds like either a diode has failed (if they did common earth) or they wired incorrectly on the resistor pack.
Fossicker
SupporterHi Gavin,
I'm going to guess here.
When the 2 resistors were installed the ground ends were commoned then wired through the (single pole) switch to ground itself.
When NOT switched the Left and Right Indicators are effectively connected together and the resistors are not connected to ground.
When switched the resistors are connected to ground and work fine.
(Ask me how I know).
The solution: get a double pole switch and use a pole for the Left resistor and the other pole for the Right resistor. You can the common the ground to the other side of the 2 poles.
Now , when NOT switched each of the left and right circuits are still independent.
When switched the resistors are connected to ground and will work fine.
Also check a diode is installed to block feedback to the CJB from the trailer brake system.
See this the D3-D4 Electric trailer brake sticky.
D4 Electric Trailer Brake Wiring
Hope I,m right 'cause its an easy fix.
Regards
GIL
Wizard
SubscriberI’ll put money on a single pole switch being fitted is the reason it’s bringing both indicators on.Originally Posted by GIL
2014, MY14 Discovery TDV6, Fuji White (2018-Now)
2003, Discovery 2a, Td5 Manual, Zambezi Silver (2012-2018)
2007, Adventure Offroad Campers, Grand Tourer (2015-Now)
YarnMaster
Thanks all for replies. Will check with the installer in a couple of weeks when we go past in our travels. I'd bought a double pole switch, but could not find it on the day, so they fitted one of theirs, so quite possibly a single. Will feedback once resolved.
D4 MY16 TDV6 - Cambo towing magic, Traxide Batteries, X Lifter, GAP ID Tool, Snorkel, Mitch Hitch, Clearview Mirrors, F&R Dashcams, CB
RRC MY95 LSE Vogue Softdash "Bessie" with MY99 TD5 and 4HP24 transplants
SADLY SOLD MY04 D2a TD5 auto and MY10 D4 2.7 both with lots of goodies
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