Random electrical faults

Pete_901 · 17th March 2020, 08:16

Getting loads of random electrical faults, Indicators staying flashing on the cluster even though there off, electric seat memory buttons not working, car not locking...all happening at once. Its a top spec ZT so have all the stuff in the boot. Water was half filling the boot so I drained it and fixed my light seals and all was fine for a few days but it's all happening again now. Any ideas?

Mike Noc · 17th March 2020, 10:12

Sounds like a K-Bus fault, and if you have had trouble with water in the boot well in the past then chances are that is still causing the problem.

Shut down the satnav and try unplugging it all and drying out the plugs and see if that helps.

Odd Job · 17th March 2020, 15:15

Yep, sounds like your gremlin has got wet!

roverbarmy · 17th March 2020, 15:25

Are the plenum drains clear? No water in ECU?

Pete_901 · 17th March 2020, 17:03

Found a small black box in the boot which was full of water and the connectors green, all cleaned out and dry and all is fine. Anyone know what the box is? Snamm black box with a plug each side in the wheel well?

Yorkshire GOC · 17th March 2020, 20:15

Trailer ECU?

Arctic · 19th March 2020, 10:44

Quote:

Originally Posted by Pete_901

Found a small black box in the boot which was full of water and the connectors green, all cleaned out and dry and all is fine. Anyone know what the box is? Snamm black box with a plug each side in the wheel well?

Hi Peter.
Tank a photo and add it here for us to view

Devilish · 19th March 2020, 18:57

Can you be a little more precise Pete. There are so many things wrong with having a boot half full of water.

Your profile says ZT-T, you posted ZT, so I will go with -T
Going by your profile you do not have a boot.
Half full - the water would rush out when you opened the lid/tailgate

By "the boot" if you are referring to the load space wheel well being half full, this could be possible, but measure the depth of water.

By "it's all happening again" are you referring to wheel well "half full", and exactly the same electrical faults.

Tell us what you did to remedy the light cluster seal leak, and how you know you do not still have water ingress.

Your next task should be to diagnose if the water ingress is from both O/S and N/S, as there are several common water ingress points. If as you say your wheel well is "half full" after a few days, it should not take long to find ingress point/s.

At the very top edge of your (dry) wheel well tape a strip of paper 1 o clock to 5 o clock, and 7 o clock to 11 o clock.

You will need to strip out your load space floor and side trim, possibly the roof rail trims, and everyone's favourite, the Rear Header Finisher ERQ100650.

Do you have a FBH, if so for how long, and has it been worked on.

Arctic · 19th March 2020, 23:08

Rear light on a Tourer or MGZT-T do not leak even if they did it would not go into the cargo area/ spare wheel well

Devilish · 19th March 2020, 23:32

Quote:

Originally Posted by Arctic

Rear light on a Tourer or MGZT-T do not leak even if they did it would not go into the cargo area/ spare wheel well

That is what I said.....Well ok, if you shut one eye and squint.

17th March 2020, 08:16	#1
Pete_901 Regular poster Mg Zt Dark Fantasy 6/7 Join Date: Jun 2016 Location: Birmingham Posts: 68 Thanks: 0 Thanked 1 Time in 1 Post	Random electrical faults Getting loads of random electrical faults, Indicators staying flashing on the cluster even though there off, electric seat memory buttons not working, car not locking...all happening at once. Its a top spec ZT so have all the stuff in the boot. Water was half filling the boot so I drained it and fixed my light seals and all was fine for a few days but it's all happening again now. Any ideas?

17th March 2020, 15:15	#3
Odd Job Gets stuck in MG ZT 2.0 cdti Join Date: Aug 2019 Location: Derby Posts: 909 Thanks: 298 Thanked 191 Times in 149 Posts	Yep, sounds like your gremlin has got wet! __________________ ….And the latest thing to break is..... ### MG STANDS FOR "MY GREMLIN" !!!

17th March 2020, 15:25	#4
roverbarmy This is my second home Roverless + 1.7D Sportage Join Date: Aug 2014 Location: East Norfolk Posts: 7,050 Thanks: 729 Thanked 2,021 Times in 1,449 Posts	Are the plenum drains clear? No water in ECU? __________________ Oil in my veins!

17th March 2020, 20:15	#6
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,063 Thanks: 1,842 Thanked 623 Times in 469 Posts	Trailer ECU? __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

19th March 2020, 18:57	#8
Devilish Been round the block 75 Tourer Join Date: Apr 2009 Location: Cannock Posts: 4,125 Thanks: 3 Thanked 189 Times in 121 Posts	Can you be a little more precise Pete. There are so many things wrong with having a boot half full of water. Your profile says ZT-T, you posted ZT, so I will go with -T Going by your profile you do not have a boot. Half full - the water would rush out when you opened the lid/tailgate By "the boot" if you are referring to the load space wheel well being half full, this could be possible, but measure the depth of water. By "it's all happening again" are you referring to wheel well "half full", and exactly the same electrical faults. Tell us what you did to remedy the light cluster seal leak, and how you know you do not still have water ingress. Your next task should be to diagnose if the water ingress is from both O/S and N/S, as there are several common water ingress points. If as you say your wheel well is "half full" after a few days, it should not take long to find ingress point/s. At the very top edge of your (dry) wheel well tape a strip of paper 1 o clock to 5 o clock, and 7 o clock to 11 o clock. You will need to strip out your load space floor and side trim, possibly the roof rail trims, and everyone's favourite, the Rear Header Finisher ERQ100650. Do you have a FBH, if so for how long, and has it been worked on. __________________ If at first you don't succeed, hide the evidence Last edited by Devilish; 19th March 2020 at 19:05..

17th March 2020, 10:12	#2
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Sounds like a K-Bus fault, and if you have had trouble with water in the boot well in the past then chances are that is still causing the problem. Shut down the satnav and try unplugging it all and drying out the plugs and see if that helps.

17th March 2020, 17:03	#5
Pete_901 Regular poster Mg Zt Dark Fantasy 6/7 Join Date: Jun 2016 Location: Birmingham Posts: 68 Thanks: 0 Thanked 1 Time in 1 Post	Found a small black box in the boot which was full of water and the connectors green, all cleaned out and dry and all is fine. Anyone know what the box is? Snamm black box with a plug each side in the wheel well?

19th March 2020, 23:08	#9
Arctic Give to Learn Freelander 2 Join Date: Aug 2010 Location: West Midlands Posts: 18,700 Thanks: 1,155 Thanked 6,407 Times in 3,874 Posts	Rear light on a Tourer or MGZT-T do not leak even if they did it would not go into the cargo area/ spare wheel well __________________ Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise "