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Discussion Starter #1
Dear RRF,

Pleased to join the community.

I have an issue I hope you can help with, I've had a read of other similar issues on the forum but I'm still unsure.

Several years ago I purchased a low mileage 96 Brooklands for my father. It was in fairly good condition and apart from a rather weak central locking/fob experience it worked fine. We sometimes had to dance around the back of the car with the fob to open/close it. Saying this I have been unable to locate any alarm equipment in the boot.

He is old (not sure exactly how old) and one of his few pleasures in life is to drive his old car so when it failed it was a bit of a pain.

A few months ago the fob was no longer able to open/close the doors, we had to use the key and this was inconvenient but acceptable. My father only drives the car once or twice a week.
Fuse C5 blew and this was replaced once - this was fine for a few weeks until things got worse.
The car would sometimes chirp when parked and other times it would be silent.

The synchronised central locking then failed and now the car would not start. Fuse C5 was ok this time. I removed the dash roll top and extracted the ECU, upon opening this I found that the unit had failed, the two batteries inside had leaked and had crystal growth. I got the board repaired by my local electronics guy Aldborough Electrics. He did say that the unit would need to be re-programmed as it had probably lost its settings, he was right - it was completely non functional and nothing worked.

After searching for a solution and failing to find a way to reflash the unit I paid for a modified alarm ECU and kit from Flying Spares (UD75069MODP) and returned my UD75069. I installed this fairly promptly upon arrival and all seemed to be fine for a few days. By trade I am familiar with electronic equipment and followed a methodical approach to install the unit, checking pins and respecting cable orientation, etc. Perhaps I missed something.

After a week we noticed that sometimes the CDL would have a mind of its own with the doors opening and closing continously and also closing/staying closed by themselves. After removing the key locking/unlocking manually this weird behaviour would right itself. Fuse C5 blew once during this time.

Unfortunately a week later there was a faint burning smell in the cabin,I disconnected the battery and we called in our trusted auto electrician Stuart from SR Auto Electrics. Stuart checked all of the fuse ratings and these were correct, also he replaced a couple of relays in case they were faulty. Unfortunately the ECU was the source of the smell.

Flying Spares were really helpful and spoke to Bowling & Co to diagnose the fault. Without collecting the failed new unit we received a replacement ECU which we were about to fit.
I checked with Flying Spares as I didn't expect a replacement to arrive until the original ECU had been diagnosed, my fear was that I didn't want to connect up the new ECU only to face the same fault.

Unfortunately Flying Spares confirmed that the replacement unit had been shipped in error, collected the failed unit. The CDL in the car was diagnosed to be at fault and this was likely to have damaged the ECU completely. In fact it had fried the circuit board in the unit completely!

Flying Spares kindly offered a reduced repair fee to repair the board but also suggested I get the car checked out properly by a Bentley specialist. My local specialist has suggested fitting an after market alarm/CDL unit instead.

I've inspected the wiring in the doors and boot as suggested and it looks like its ok, no obvious cable breaks or shorts. I have also removed the driver door central locking switch and this seems to be in good order. I will work my way around the care to make sure the others are not oxidised or sticking but I don't understand how a switch fault could 'fry' the ECU without blowing the fuse first.

I know FS and Bowling are the experts and so I trust their analysis but I'm unsure on what to do next on this issue. I could fit an after market alarm but face the same issue or I could spend even more money on repairing the Bowling unit and have it blow again.

I'll keep going and check all the central locking switches with a light bulb and tester.
Any ideas or shared experience appreciated.

Thank you.
 

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The only expert is John Bowling. and his team....more than 40 years working directly for Crewe....
You should have gone directly to Bowling and not FS then Bowling.....
Bowling would have ask you to uninstall the complete original alram system with key fob , hsip it, then woiuld have repair, test and program...

You should have all parts checked by Bowling,

If you still have the original alarm ECU, you should send it to Bowling with key fob for complete test and renovation.

Is it a Clifford ?

Keep the original sytem.
What is CDL ? Door lock ?
 

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Discussion Starter #3
Indeed, that might have been better but I hadn't heard of Bowling until recently.
Also they (Bowling & Co) have the complete and original system with key fob as well as the new damaged unit and its key fobs.
The original unit was factory fitted so I'm not sure if it is Clifford. CDL is Central Door Locking.
Thanks for replying Jean.
 

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So why don't you contact directly Bowling, ask Graham, he is the number 2 after John if I may say that.
I can give you their information if you need, phone and email....

They are the best personn to help you to solve your issue, but the best is to deal directly with them, not through a third entity.
 

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Discussion Starter #5
So why don't you contact directly Bowling, ask Graham, he is the number 2 after John if I may say that.
I can give you their information if you need, phone and email....

They are the best personn to help you to solve your issue, but the best is to deal directly with them, not through a third entity.
I have already made contact with Graham and he made some suggestions. Very hard to work out where the fault is remotely or the exact cause. I cannot see that Graham would suggest an aftermarket alarm which could potentially be a better and far cheaper route than the repaired ECU.
 

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Discussion Starter #6
Hi all, after getting some guidance from a few helpful parties at Flying Spares and Bowlings my auto electrician (Stuart from SR) went through the car, checking the door solenoids and boot. He found the drivers side solenoid to be faulty which would explain why the car kept opening and closing before the failure. This was not enough to blow the fuse but did severe damage to the new ECU from Bowlings. I've purchased another ECU and solenoid from FS (as they were my original pont of contact) and the plan is to introduce additional fuses as well as try lower rated fuses to begin with. Hopefully this will get the car going again. In terms of aftermarket alarm - yes it is possible to do this but the difference in cost is minor; it increases complexity as well as ignoring the underlying faults. Thanks for your help.
 
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