Member Since: 08 Jun 2013
Location: Essex
Posts: 5
Discovery 3 Tailgate Intermittent Fault
a month ago my discovery 3 tailgate decided to fail. From the great forums on this site I managed to get the boot open and the cable had broken in the actuator, so I went off to a local LR supplier and fitted new actuator and cable. The part was fitted and worked ok for a week and the failed. So i went back to the forum and thought it would be the microswitch so new part fitted, re assembled and the tailgate worked for 24 hours then nothing. The lock/unlock theory on the dash doesn't work for me so again trim removed and gate open. So today dismantled again and new latch fitted. All worked well whilst trim wasn't attached and then trim attached and then the gate won't open.
I can only think that there is some sort of electrical failure in the circuit. Has anyone experience this type of problem?
PS - If anyone in the Essex area needs the tailgate opening on a disco 3 I am now a master!
Thanks
Tom
25th Apr 2015 7:24 pm
mark the spark
Member Since: 22 Jun 2011
Location: southampton
Posts: 2477
Did you replace the plastic spring actuator assembly or the cable and lock assemblyMY05 SE D3 Manual my first LR what a car
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25th Apr 2015 8:53 pm
TomLand
Member Since: 08 Jun 2013
Location: Essex
Posts: 5
Hi
first replacement - actuator cable and latch
second replacement - microswitch
third replacement cable and latch (because I thought the microswitch in the latch was faulty)
I can only think that the actuator I bought on the first replacement was faulty. This part was not from a LR dealership.
I will replace the actuator then the whole set up should be new.
Is there a relay on this circuit as I might replace that also
You can't hear the actuator working.
The tailgate switch doesn't open it.
The lock/unlock buttons don't open it.
Assuming the above is correct then it is either the actuator or the wiring to the actuator.
Seeing as you have replaced the actuator already, I would suspect the wiring first but then again...
Quote:
Is there a relay on this circuit as I might replace that also
No, it uses an FET in the central junction box (CJB). Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
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26th Apr 2015 9:32 am
TomLand
Member Since: 08 Jun 2013
Location: Essex
Posts: 5
Yes
No Noise from actuator, dash lock/unlock and nothing from the tailgate switch. I bet if I dismantle the boot it will work. So must be a wiring issue
I will have another go
26th Apr 2015 11:54 am
Dickydisco
Member Since: 03 Feb 2009
Location: Colchester
Posts: 501
Hey Tom
Did you get this sorted? I've changed micro switch and the latch assembly! It work sometimes but I have to push in the tailgate as I press switch otherwise it won't release! There's no damage to the door, I've tried adjusting the catch thinking it's too tight and dash buttons don't work!
Testing the voltage to the actuator from memory I get circa 12 v! Not every time mind! When it does work that is when the V is higher! It then drops to 10.6v making it not work! Batt V stays steady all the while! Btw. Brand new batt only a month or so ago!
Checked what I assume are earth straps on upper hinges!
I'm out of options! Next I'm guessing it's a wire chasing exercise??
Any idea?Current: D3 commercial
Past: but not forgotten D3 HSE x2, 5 TD5 disco2's, 1 200tdi disco1, 2 300tdi disco1 one of which was a commercial, Off roader with a rather large spec, ARB's and big travel suspension to name a few.
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17th Aug 2015 7:59 am
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Member Since: 12 Oct 2009
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Did you get to the bottom of this? I'm having similar issues
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1st Oct 2015 12:06 am
dytor
Member Since: 02 Jun 2015
Location: WA
Posts: 9
Hi. Has anyone found a solution to this issue as I am having the same problem. The actuator is working, cable is not broken but the tailgate will not open unless I apply hand pressure to the tailgate before pressing the button.
In addition if I press the unlock button repeatedly after the fourth or fifth time the actuator stops working. If I wait a short period of time then press the button again the actuator works.
I have sprayed the lock and cable with WD40 but this does not help.
If I press the two unlock/lock buttons on the dash then there seems to be a more positive unlock "sound" from the actuator and the tailgate partly opens but doesn't unlock fully.
Thanks
21st Oct 2015 12:19 am
Johs
Member Since: 27 Feb 2019
Location: Hjoerring
Posts: 1
Hej
Did you find the problem. I got the same problem on my 2005
27th Feb 2019 6:14 am
dytor
Member Since: 02 Jun 2015
Location: WA
Posts: 9
Hi
I installed a new actuator. It sorted the problem straight away.
27th Feb 2019 6:26 am
nivekau
Member Since: 19 Apr 2012
Location: Melbourne, Victoria
Posts: 85
I had a similar problem to this, but I could hear the actuator - it was like the actuator just wasn't powerful enough. Only failed when the car had been sitting with the sun on the rear door on really hot days. So obviously temp sensitive.
Changed the actuator and it worked fine, then the cable broke 2007 Land Rover LR3 4.0L V6
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5th Mar 2019 12:37 am
Ben4
Member Since: 28 Apr 2017
Location: Buckinghamshire
Posts: 934
check the wires close to the switch in the handle - mine had been trapped and frayed: causing the intermittent faults.formerly Disco3Ben
2016 D4, Santorini Black
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5th Mar 2019 2:28 pm
nhollandsmith
Member Since: 26 Nov 2011
Location: Gdansk
Posts: 327
I had intermittent problems during the summer when the weather was warm with not being able to open the boot, so ordered a new switch and replaced.
At half term a few weeks ago, I was in France and after the rear of the car had been facing the sun for much of the day the boot again would not open.
I have come to a conclusion that perhaps the hot weather can cause problems to the boot mechanism.
I have had no problems since back in the last few weeks.
7th Mar 2019 11:28 pm
nivekau
Member Since: 19 Apr 2012
Location: Melbourne, Victoria
Posts: 85
nhollandsmith, that's a concern that the new one exhibits the same fault. Mine has been okay since replacement, and we've had some 35+ degree days, however I haven't put the interior trim back on the tailgate door yet, so the air can circulate and keep it cooler. Maybe it need a fan to keep it cool 2007 Land Rover LR3 4.0L V6
Other current other cars
2022 BMW X3 xDrive 30i
2000 Mercedes ML430 (enjoying the challenge of keeping it going!)
1973 Bristol 411 S5
If you are interested in Bristols (the cars), click on my WWW button below...
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