Whole host of confusing issues

[alexsully]

Hi all,


Yesterday morning, after hitting the brakes quite hard when someone pulled out on me, the car stopped changing gear. I slid it over to manual and it changed up and down fine. I have since realised that the issues with gear change are only when i have the driving lights turned on. Turn them off and the auto changes up and down without issue.


I checked the lights and noticed that my right hand brake lights is not working. However, when I turn the driving lights on, my brake lights lock on as if the brake pedal has been pressed but the right hand brake light no longer illuminates and the left hand brake light, that wasn't working, does illuminate!!!


I'm at a total loss!!!!


Any help would be hugely appreciated.

[loanrangie]

If its a D3 i would bet its the brake light switch, early D3 and could be the tail light bulbs as well.
Sounds like the wiring for the spotties is a bit suss as too.

[DieselLSE]

What loanrangie says. Whether D3 or D4 check to see where the driving light pick up point is. My guess is that it is interfering with a canbus signal if it's a later model. To diagnose, I would disconnect the driving lights and see if you can duplicate the issue.
It would help if you'd tell us what model and how the driving lights have been wired up.

[John_D4]

I think the problem is that your car is refusing to be nocturnal and only wants to be driven in the day time.

Hope that helps!

[Tombie]

What loanrangie says. Whether D3 or D4 check to see where the driving light pick up point is. My guess is that it is interfering with a canbus signal if it's a later model. To diagnose, I would disconnect the driving lights and see if you can duplicate the issue.
It would help if you'd tell us what model and how the driving lights have been wired up.

Unlikely to be a canbus issue. On a D3 it will be the switch and/or brake globes.

The sudden stop my have pulled a tight cable or disconnected an earth.

[PerthDisco]

Yep 4 new (genuine LR) globes to the upper and lower brake lights solved similar confusion for me recently. Do before considering brake switch charge.

[Discodicky]

Hi all,


Yesterday morning, after hitting the brakes quite hard when someone pulled out on me, the car stopped changing gear. I slid it over to manual and it changed up and down fine. I have since realised that the issues with gear change are only when i have the driving lights turned on. Turn them off and the auto changes up and down without issue.


I checked the lights and noticed that my right hand brake lights is not working. However, when I turn the driving lights on, my brake lights lock on as if the brake pedal has been pressed but the right hand brake light no longer illuminates and the left hand brake light, that wasn't working, does illuminate!!!


I'm at a total loss!!!!


Any help would be hugely appreciated.

I had an interesting & similar problem with my MY13 TDV6 the other day. Coming out of a local council playground (had grandchildren to amuse for a few hours) and slightly downhill with speed humps. Doing roughly 10 kph and as I went over the speed hump and took my foot off the accelerator to reduce the jolt thru the car, the trans coincidentally decided to change up from 1st to 2nd. The jolt thru the car caused by the speed hump and the upchange at same time somehow caused the trans to refuse to change into higher gears from that point on. I stopped the car, switched off the engine and re-started and no problems, the auto shift was fine. has never happened since. Go figure.

[alexsully]

Thanks all for the suggestions.

My boot release cable has come away from the mechanism but this is booked in with the mechanic on friday. Once that's fixed I'll set about changing all the bulbs and see if we get anywhere. If not, brake switch.

Thanks again!!

[SimmAus]

I had an interesting & similar problem with my MY13 TDV6 the other day. Coming out of a local council playground (had grandchildren to amuse for a few hours) and slightly downhill with speed humps. Doing roughly 10 kph and as I went over the speed hump and took my foot off the accelerator to reduce the jolt thru the car, the trans coincidentally decided to change up from 1st to 2nd. The jolt thru the car caused by the speed hump and the upchange at same time somehow caused the trans to refuse to change into higher gears from that point on. I stopped the car, switched off the engine and re-started and no problems, the auto shift was fine. has never happened since. Go figure.

Reading this, I’ve also experienced similar. However I put it down to the car sensing no throttle input, going down hill, and holding the gears to arrest a run away. No need to restart....manually change gear with gear shift/paddle and all good.

[Tombie]

Save yourself a heap of cash and buy the new brake switch from Ford. A quick search will find the ford part number - it’s the exact switch (if you remove yours it will be stamped Ford) and significantly cheaper.

[loanrangie]

Save yourself a heap of cash and buy the new brake switch from Ford. A quick search will find the ford part number - it’s the exact switch (if you remove yours it will be stamped Ford) and significantly cheaper.

Yep, Ford Territory SY/SZ from memory - i just threw out the packet last week, meant to write the part # down.